125649402 has 16 divisors (see below), whose sum is σ = 259964640. Its totient is φ = 40438832.

The previous prime is 125649383. The next prime is 125649427. The reversal of 125649402 is 204946521.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 360888 + ... + 361235.

It is an arithmetic number, because the mean of its divisors is an integer number (16247790).

Almost surely, 2^125649402 is an apocalyptic number.

125649402 is an abundant number, since it is smaller than the sum of its proper divisors (134315238).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

125649402 is a wasteful number, since it uses less digits than its factorization.

125649402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722157.

The product of its (nonzero) digits is 17280, while the sum is 33.

The square root of 125649402 is about 11209.3444054503. The cubic root of 125649402 is about 500.8643741868.

The spelling of 125649402 in words is "one hundred twenty-five million, six hundred forty-nine thousand, four hundred two".