1172721925 has 12 divisors (see below), whose sum is σ = 1461488800. Its totient is φ = 933459120.

The previous prime is 1172721917. The next prime is 1172721941. The reversal of 1172721925 is 5291272711.

It is a happy number.

It is not a de Polignac number, because 1172721925 - 2³ = 1172721917 is a prime.

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 112887 + ... + 122836.

Almost surely, 2^1172721925 is an apocalyptic number.

It is an amenable number.

1172721925 is a deficient number, since it is larger than the sum of its proper divisors (288766875).

1172721925 is a wasteful number, since it uses less digits than its factorization.

1172721925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 235932 (or 235927 counting only the distinct ones).

The product of its digits is 17640, while the sum is 37.

The square root of 1172721925 is about 34245.0277412649. The cubic root of 1172721925 is about 1054.5447524081.

The spelling of 1172721925 in words is "one billion, one hundred seventy-two million, seven hundred twenty-one thousand, nine hundred twenty-five".