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140625 = 3256
BaseRepresentation
bin100010010101010001
321010220100
4202111101
514000000
63003013
71123662
oct422521
9233810
10140625
1196721
1269469
134c014
1439369
152ba00
hex22551

140625 has 21 divisors (see below), whose sum is σ = 253903. Its totient is φ = 75000.

The previous prime is 140617. The next prime is 140627. The reversal of 140625 is 526041.

Adding to 140625 its reverse (526041), we get a palindrome (666666).

It can be divided in two parts, 1406 and 25, that added together give a triangular number (1431 = T53).

140625 = T374 + T375.

It is a happy number.

The square root of 140625 is 375.

It is a perfect power (a square), and thus also a powerful number.

140625 is a `hidden beast` number, since 1 + 40 + 625 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 123201 + 17424 = 351^2 + 132^2 .

It is not a de Polignac number, because 140625 - 23 = 140617 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 140598 and 140607.

It is not an unprimeable number, because it can be changed into a prime (140627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 20 ways as a sum of consecutive naturals, for example, 28123 + ... + 28127.

140625 is a Friedman number, since it can be written as 5^6*(4-1-0)^2, using all its digits and the basic arithmetic operations.

2140625 is an apocalyptic number.

140625 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

140625 is the 375-th square number.

140625 is the 188-th centered octagonal number.

It is an amenable number.

140625 is a deficient number, since it is larger than the sum of its proper divisors (113278).

140625 is an frugal number, since it uses more digits than its factorization.

140625 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36 (or 8 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The cubic root of 140625 is about 52.0020955763.

The spelling of 140625 in words is "one hundred forty thousand, six hundred twenty-five".