12157772 has 24 divisors (see below), whose sum is σ = 23708160. Its totient is φ = 5407760.

The previous prime is 12157763. The next prime is 12157781. The reversal of 12157772 is 27775121.

It is an interprime number because it is at equal distance from previous prime (12157763) and next prime (12157781).

It is a super-2 number, since 2×12157772² = 295622840007968, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 872 + ... + 5007.

It is an arithmetic number, because the mean of its divisors is an integer number (987840).

Almost surely, 2^12157772 is an apocalyptic number.

It is an amenable number.

12157772 is a deficient number, since it is larger than the sum of its proper divisors (11550388).

12157772 is a wasteful number, since it uses less digits than its factorization.

12157772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5941 (or 5939 counting only the distinct ones).

The product of its digits is 6860, while the sum is 32.

The square root of 12157772 is about 3486.7996787886. The cubic root of 12157772 is about 229.9418378452.

The spelling of 12157772 in words is "twelve million, one hundred fifty-seven thousand, seven hundred seventy-two".