1172725644 has 12 divisors (see below), whose sum is σ = 2736359864. Its totient is φ = 390908544.

The previous prime is 1172725621. The next prime is 1172725649. The reversal of 1172725644 is 4465272711.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1172725649) 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 in 3 ways as a sum of consecutive naturals, for example, 48863557 + ... + 48863580.

Almost surely, 2^1172725644 is an apocalyptic number.

It is an amenable number.

1172725644 is an abundant number, since it is smaller than the sum of its proper divisors (1563634220).

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

1172725644 is a wasteful number, since it uses less digits than its factorization.

1172725644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97727144 (or 97727142 counting only the distinct ones).

The product of its digits is 94080, while the sum is 39.

The square root of 1172725644 is about 34245.0820410756. The cubic root of 1172725644 is about 1054.5458671502.

The spelling of 1172725644 in words is "one billion, one hundred seventy-two million, seven hundred twenty-five thousand, six hundred forty-four".