1172725656 has 128 divisors (see below), whose sum is σ = 3192583680. Its totient is φ = 357958656.

The previous prime is 1172725649. The next prime is 1172725661. The reversal of 1172725656 is 6565272711.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 1367980 + ... + 1368836.

It is an arithmetic number, because the mean of its divisors is an integer number (24942060).

Almost surely, 2^1172725656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1172725656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1596291840).

1172725656 is an abundant number, since it is smaller than the sum of its proper divisors (2019858024).

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

1172725656 is a wasteful number, since it uses less digits than its factorization.

1172725656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 993 (or 989 counting only the distinct ones).

The product of its digits is 176400, while the sum is 42.

The square root of 1172725656 is about 34245.0822162833. The cubic root of 1172725656 is about 1054.5458707471.

The spelling of 1172725656 in words is "one billion, one hundred seventy-two million, seven hundred twenty-five thousand, six hundred fifty-six".