126256725 has 72 divisors (see below), whose sum is σ = 268107840. Its totient is φ = 57697920.

The previous prime is 126256723. The next prime is 126256747. The reversal of 126256725 is 527652621.

126256725 is a `hidden beast` number, since 1 + 2 + 625 + 6 + 7 + 25 = 666.

It is not a de Polignac number, because 126256725 - 2¹ = 126256723 is a prime.

It is a super-3 number, since 3×126256725³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 126256725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126256721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 41041 + ... + 44009.

It is an arithmetic number, because the mean of its divisors is an integer number (3723720).

Almost surely, 2^126256725 is an apocalyptic number.

126256725 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

126256725 is an abundant number, since it is smaller than the sum of its proper divisors (141851115).

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

126256725 is an equidigital number, since it uses as much as digits as its factorization.

126256725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3001 (or 2984 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

The square root of 126256725 is about 11236.4017817093. The cubic root of 126256725 is about 501.6700489955.

The spelling of 126256725 in words is "one hundred twenty-six million, two hundred fifty-six thousand, seven hundred twenty-five".