125640319 has 8 divisors (see below), whose sum is σ = 152035488. Its totient is φ = 101356800.

The previous prime is 125640313. The next prime is 125640377. The reversal of 125640319 is 913046521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 125640319 - 2²⁵ = 92085887 is a prime.

It is a super-2 number, since 2×125640319² = 31570979516843522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125640313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 527782 + ... + 528019.

It is an arithmetic number, because the mean of its divisors is an integer number (19004436).

Almost surely, 2^125640319 is an apocalyptic number.

125640319 is a deficient number, since it is larger than the sum of its proper divisors (26395169).

125640319 is a wasteful number, since it uses less digits than its factorization.

125640319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055825.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 125640319 is about 11208.9392450847. The cubic root of 125640319 is about 500.8523049935.

The spelling of 125640319 in words is "one hundred twenty-five million, six hundred forty thousand, three hundred nineteen".