125800040 has 32 divisors (see below), whose sum is σ = 284256000. Its totient is φ = 50105664.

The previous prime is 125800033. The next prime is 125800043. The reversal of 125800040 is 40008521.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 125799985 and 125800021.

It is not an unprimeable number, because it can be changed into a prime (125800043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2981 + ... + 16139.

It is an arithmetic number, because the mean of its divisors is an integer number (8883000).

Almost surely, 2^125800040 is an apocalyptic number.

125800040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

125800040 is an abundant number, since it is smaller than the sum of its proper divisors (158455960).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125800040 is a wasteful number, since it uses less digits than its factorization.

125800040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13409 (or 13405 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 20.

The square root of 125800040 is about 11216.0616974052. The cubic root of 125800040 is about 501.0644522746.

Adding to 125800040 its reverse (40008521), we get a palindrome (165808561).

The spelling of 125800040 in words is "one hundred twenty-five million, eight hundred thousand, forty".