125864531 has 8 divisors (see below), whose sum is σ = 142680720. Its totient is φ = 110067552.

The previous prime is 125864513. The next prime is 125864551. The reversal of 125864531 is 135468521.

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 125864531 - 2⁶ = 125864467 is a prime.

It is a super-2 number, since 2×125864531² = 31683760327699922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 125864491 and 125864500.

It is not an unprimeable number, because it can be changed into a prime (125864551) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 254540 + ... + 255033.

It is an arithmetic number, because the mean of its divisors is an integer number (17835090).

Almost surely, 2^125864531 is an apocalyptic number.

125864531 is a deficient number, since it is larger than the sum of its proper divisors (16816189).

125864531 is a wasteful number, since it uses less digits than its factorization.

125864531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 509605.

The product of its digits is 28800, while the sum is 35.

The square root of 125864531 is about 11218.9362686486. The cubic root of 125864531 is about 501.1500606927.

The spelling of 125864531 in words is "one hundred twenty-five million, eight hundred sixty-four thousand, five hundred thirty-one".