725247136 has 12 divisors (see below), whose sum is σ = 1427830362. Its totient is φ = 362623552.

The previous prime is 725247121. The next prime is 725247137. The reversal of 725247136 is 631742527.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 715883536 + 9363600 = 26756^2 + 3060^2 .

It is a junction number, because it is equal to n+sod(n) for n = 725247095 and 725247104.

It is not an unprimeable number, because it can be changed into a prime (725247137) 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 as a sum of consecutive naturals, namely, 11331955 + ... + 11332018.

Almost surely, 2^725247136 is an apocalyptic number.

It is an amenable number.

725247136 is a deficient number, since it is larger than the sum of its proper divisors (702583226).

725247136 is a wasteful number, since it uses less digits than its factorization.

725247136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22663983 (or 22663975 counting only the distinct ones).

The product of its digits is 70560, while the sum is 37.

The square root of 725247136 is about 26930.4128449602. The cubic root of 725247136 is about 898.4529537663.

The spelling of 725247136 in words is "seven hundred twenty-five million, two hundred forty-seven thousand, one hundred thirty-six".