| Base | Representation |
|---|---|
| bin | 1110111110100… |
| … | …01110101010010 |
| 3 | 22202102011201000 |
| 4 | 13133101311102 |
| 5 | 224130440033 |
| 6 | 20244522430 |
| 7 | 3053631300 |
| oct | 737216522 |
| 9 | 282364630 |
| 10 | 125640018 |
| 11 | 64a14229 |
| 12 | 360b0416 |
| 13 | 2005010a |
| 14 | 12987270 |
| 15 | b06ba13 |
| hex | 77d1d52 |
125640018 has 96 divisors (see below), whose sum is σ = 328648320. Its totient is φ = 35471520.
The previous prime is 125640017. The next prime is 125640029. The reversal of 125640018 is 810046521.
125640018 is a `hidden beast` number, since 1 + 2 + 5 + 640 + 0 + 18 = 666.
It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.
It is a Harshad number since it is a multiple of its sum of digits (27).
It is a junction number, because it is equal to n+sod(n) for n = 125639973 and 125640000.
It is not an unprimeable number, because it can be changed into a prime (125640017) by changing a digit.
It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 272308 + ... + 272768.
It is an arithmetic number, because the mean of its divisors is an integer number (3423420).
Almost surely, 2125640018 is an apocalyptic number.
125640018 is a gapful number since it is divisible by the number (18) formed by its first and last digit.
It is a practical number, because each smaller number is the sum of distinct divisors of 125640018, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (164324160).
125640018 is an abundant number, since it is smaller than the sum of its proper divisors (203008302).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
125640018 is a wasteful number, since it uses less digits than its factorization.
125640018 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 589 (or 576 counting only the distinct ones).
The product of its (nonzero) digits is 1920, while the sum is 27.
The square root of 125640018 is about 11208.9258182932. The cubic root of 125640018 is about 500.8519050246.
Adding to 125640018 its reverse (810046521), we get a palindrome (935686539).
The spelling of 125640018 in words is "one hundred twenty-five million, six hundred forty thousand, eighteen".
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