725642634 has 8 divisors (see below), whose sum is σ = 1451285280. Its totient is φ = 241880876.

The previous prime is 725642597. The next prime is 725642639. The reversal of 725642634 is 436246527.

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

725642634 is an admirable number.

It is a junction number, because it is equal to n+sod(n) for n = 725642592 and 725642601.

It is not an unprimeable number, because it can be changed into a prime (725642639) by changing a digit.

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, 60470214 + ... + 60470225.

It is an arithmetic number, because the mean of its divisors is an integer number (181410660).

Almost surely, 2^725642634 is an apocalyptic number.

725642634 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

725642634 is a wasteful number, since it uses less digits than its factorization.

725642634 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120940444.

The product of its digits is 241920, while the sum is 39.

The square root of 725642634 is about 26937.7548062195. The cubic root of 725642634 is about 898.6162414497.

The spelling of 725642634 in words is "seven hundred twenty-five million, six hundred forty-two thousand, six hundred thirty-four".