125421634 has 8 divisors (see below), whose sum is σ = 202604220. Its totient is φ = 57886896.

The previous prime is 125421617. The next prime is 125421643. The reversal of 125421634 is 436124521.

It can be written as a sum of positive squares in 2 ways, for example, as 107060409 + 18361225 = 10347^2 + 4285^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2411929 + ... + 2411980.

Almost surely, 2^125421634 is an apocalyptic number.

125421634 is a deficient number, since it is larger than the sum of its proper divisors (77182586).

125421634 is a wasteful number, since it uses less digits than its factorization.

125421634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4823924.

The product of its digits is 5760, while the sum is 28.

The square root of 125421634 is about 11199.1800592722. The cubic root of 125421634 is about 500.5615477588.

The spelling of 125421634 in words is "one hundred twenty-five million, four hundred twenty-one thousand, six hundred thirty-four".