125678139 has 8 divisors (see below), whose sum is σ = 167645520. Its totient is φ = 83748096.

The previous prime is 125678107. The next prime is 125678209. The reversal of 125678139 is 931876521.

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

It is not a de Polignac number, because 125678139 - 2⁵ = 125678107 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 125678139.

It is not an unprimeable number, because it can be changed into a prime (125608139) 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, 202 + ... + 15855.

It is an arithmetic number, because the mean of its divisors is an integer number (20955690).

Almost surely, 2^125678139 is an apocalyptic number.

125678139 is a deficient number, since it is larger than the sum of its proper divisors (41967381).

125678139 is a wasteful number, since it uses less digits than its factorization.

125678139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18669.

The product of its digits is 90720, while the sum is 42.

The square root of 125678139 is about 11210.6261644923. The cubic root of 125678139 is about 500.9025551415.

It can be divided in two parts, 12567 and 8139, that added together give a triangular number (20706 = T₂₀₃).

The spelling of 125678139 in words is "one hundred twenty-five million, six hundred seventy-eight thousand, one hundred thirty-nine".