125638606 has 12 divisors (see below), whose sum is σ = 193693248. Its totient is φ = 61120152.

The previous prime is 125638603. The next prime is 125638631. The reversal of 125638606 is 606836521.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125638603) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20206 + ... + 25681.

It is an arithmetic number, because the mean of its divisors is an integer number (16141104).

Almost surely, 2^125638606 is an apocalyptic number.

125638606 is a deficient number, since it is larger than the sum of its proper divisors (68054642).

125638606 is an equidigital number, since it uses as much as digits as its factorization.

125638606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45963 (or 45926 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 125638606 is about 11208.8628325981. The cubic root of 125638606 is about 500.8500287500.

The spelling of 125638606 in words is "one hundred twenty-five million, six hundred thirty-eight thousand, six hundred six".