125408638 has 4 divisors (see below), whose sum is σ = 188112960. Its totient is φ = 62704318.

The previous prime is 125408623. The next prime is 125408639. The reversal of 125408638 is 836804521.

It is a happy number.

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

It is a junction number, because it is equal to n+sod(n) for n = 125408597 and 125408606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125408639) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31352158 + ... + 31352161.

It is an arithmetic number, because the mean of its divisors is an integer number (47028240).

Almost surely, 2^125408638 is an apocalyptic number.

125408638 is a deficient number, since it is larger than the sum of its proper divisors (62704322).

125408638 is an equidigital number, since it uses as much as digits as its factorization.

125408638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62704321.

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 125408638 is about 11198.5998231922. The cubic root of 125408638 is about 500.5442580181.

The spelling of 125408638 in words is "one hundred twenty-five million, four hundred eight thousand, six hundred thirty-eight".