11921656 has 8 divisors (see below), whose sum is σ = 22353120. Its totient is φ = 5960824.

The previous prime is 11921633. The next prime is 11921669. The reversal of 11921656 is 65612911.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 745096 + ... + 745111.

It is an arithmetic number, because the mean of its divisors is an integer number (2794140).

Almost surely, 2^11921656 is an apocalyptic number.

It is an amenable number.

11921656 is a deficient number, since it is larger than the sum of its proper divisors (10431464).

11921656 is a wasteful number, since it uses less digits than its factorization.

11921656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1490213 (or 1490209 counting only the distinct ones).

The product of its digits is 3240, while the sum is 31.

The square root of 11921656 is about 3452.7751157583. The cubic root of 11921656 is about 228.4435297859.

The spelling of 11921656 in words is "eleven million, nine hundred twenty-one thousand, six hundred fifty-six".