725425634 has 4 divisors (see below), whose sum is σ = 1088138454. Its totient is φ = 362712816.

The previous prime is 725425627. The next prime is 725425639. The reversal of 725425634 is 436524527.

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., 436935409 + 288490225 = 20903^2 + 16985^2 .

It is not an unprimeable number, because it can be changed into a prime (725425639) by changing a digit.

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 as a sum of consecutive naturals, namely, 181356407 + ... + 181356410.

Almost surely, 2^725425634 is an apocalyptic number.

725425634 is a deficient number, since it is larger than the sum of its proper divisors (362712820).

725425634 is a wasteful number, since it uses less digits than its factorization.

725425634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 362712819.

The product of its digits is 201600, while the sum is 38.

The square root of 725425634 is about 26933.7267009228. The cubic root of 725425634 is about 898.5266568726.

The spelling of 725425634 in words is "seven hundred twenty-five million, four hundred twenty-five thousand, six hundred thirty-four".