125931690 has 48 divisors (see below), whose sum is σ = 328185000. Its totient is φ = 33503616.

The previous prime is 125931661. The next prime is 125931713. The reversal of 125931690 is 96139521.

125931690 is a `hidden beast` number, since 1 + 2 + 593 + 1 + 69 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 95824521 + 30107169 = 9789^2 + 5487^2 .

It is a super-2 number, since 2×125931690² = 31717581092512200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 44436 + ... + 47184.

Almost surely, 2^125931690 is an apocalyptic number.

125931690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

125931690 is an abundant number, since it is smaller than the sum of its proper divisors (202253310).

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

125931690 is a wasteful number, since it uses less digits than its factorization.

125931690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3271 (or 3268 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 125931690 is about 11221.9289785669. The cubic root of 125931690 is about 501.2391796637.

It can be divided in two parts, 125931 and 690, that added together give a palindrome (126621).

The spelling of 125931690 in words is "one hundred twenty-five million, nine hundred thirty-one thousand, six hundred ninety".