11621972 has 12 divisors (see below), whose sum is σ = 20771520. Its totient is φ = 5687256.

The previous prime is 11621957. The next prime is 11621989. The reversal of 11621972 is 27912611.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30722 + ... + 31097.

It is an arithmetic number, because the mean of its divisors is an integer number (1730960).

Almost surely, 2^11621972 is an apocalyptic number.

It is an amenable number.

11621972 is a deficient number, since it is larger than the sum of its proper divisors (9149548).

11621972 is a wasteful number, since it uses less digits than its factorization.

11621972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61870 (or 61868 counting only the distinct ones).

The product of its digits is 1512, while the sum is 29.

The square root of 11621972 is about 3409.1013478628. The cubic root of 11621972 is about 226.5130745327.

The spelling of 11621972 in words is "eleven million, six hundred twenty-one thousand, nine hundred seventy-two".