11992557 has 8 divisors (see below), whose sum is σ = 16006176. Its totient is φ = 7986992.

The previous prime is 11992511. The next prime is 11992559. The reversal of 11992557 is 75529911.

11992557 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11992557 - 2⁶ = 11992493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11992559) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4243 + ... + 6479.

It is an arithmetic number, because the mean of its divisors is an integer number (2000772).

Almost surely, 2^11992557 is an apocalyptic number.

It is an amenable number.

11992557 is a deficient number, since it is larger than the sum of its proper divisors (4013619).

11992557 is a wasteful number, since it uses less digits than its factorization.

11992557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4027.

The product of its digits is 28350, while the sum is 39.

The square root of 11992557 is about 3463.0271439883. The cubic root of 11992557 is about 228.8955047871.

The spelling of 11992557 in words is "eleven million, nine hundred ninety-two thousand, five hundred fifty-seven".