125730879 has 4 divisors (see below), whose sum is σ = 167641176. Its totient is φ = 83820584.

The previous prime is 125730851. The next prime is 125730881. The reversal of 125730879 is 978037521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 125730879 - 2⁷ = 125730751 is a prime.

It is a super-2 number, since 2×125730879² = 31616507868225282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 125730879.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125730679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20955144 + ... + 20955149.

It is an arithmetic number, because the mean of its divisors is an integer number (41910294).

Almost surely, 2^125730879 is an apocalyptic number.

125730879 is a deficient number, since it is larger than the sum of its proper divisors (41910297).

125730879 is an equidigital number, since it uses as much as digits as its factorization.

125730879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41910296.

The product of its (nonzero) digits is 105840, while the sum is 42.

The square root of 125730879 is about 11212.9781503399. The cubic root of 125730879 is about 500.9726121578.

The spelling of 125730879 in words is "one hundred twenty-five million, seven hundred thirty thousand, eight hundred seventy-nine".