125512642 has 4 divisors (see below), whose sum is σ = 188268966. Its totient is φ = 62756320.

The previous prime is 125512637. The next prime is 125512661. The reversal of 125512642 is 246215521.

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

It can be written as a sum of positive squares in only one way, i.e., 100821681 + 24690961 = 10041^2 + 4969^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 125512642.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31378159 + ... + 31378162.

Almost surely, 2^125512642 is an apocalyptic number.

125512642 is a deficient number, since it is larger than the sum of its proper divisors (62756324).

125512642 is an equidigital number, since it uses as much as digits as its factorization.

125512642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62756323.

The product of its digits is 4800, while the sum is 28.

The square root of 125512642 is about 11203.2424770689. The cubic root of 125512642 is about 500.6825903834.

The spelling of 125512642 in words is "one hundred twenty-five million, five hundred twelve thousand, six hundred forty-two".