125940639 has 8 divisors (see below), whose sum is σ = 183186432. Its totient is φ = 76327640.

The previous prime is 125940623. The next prime is 125940673. The reversal of 125940639 is 936049521.

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 125940639 - 2⁴ = 125940623 is a prime.

It is a super-2 number, since 2×125940639² = 31722089103456642, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 125940597 and 125940606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125940239) 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, 1908159 + ... + 1908224.

It is an arithmetic number, because the mean of its divisors is an integer number (22898304).

Almost surely, 2^125940639 is an apocalyptic number.

125940639 is a deficient number, since it is larger than the sum of its proper divisors (57245793).

125940639 is a wasteful number, since it uses less digits than its factorization.

125940639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3816397.

The product of its (nonzero) digits is 58320, while the sum is 39.

The square root of 125940639 is about 11222.3276997243. The cubic root of 125940639 is about 501.2510524581.

The spelling of 125940639 in words is "one hundred twenty-five million, nine hundred forty thousand, six hundred thirty-nine".