12156553 has 2 divisors, whose sum is σ = 12156554. Its totient is φ = 12156552.

The previous prime is 12156527. The next prime is 12156563. The reversal of 12156553 is 35565121.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9290304 + 2866249 = 3048^2 + 1693^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12156553 is a prime.

It is not a weakly prime, because it can be changed into another prime (12156563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6078276 + 6078277.

It is an arithmetic number, because the mean of its divisors is an integer number (6078277).

Almost surely, 2^12156553 is an apocalyptic number.

It is an amenable number.

12156553 is a deficient number, since it is larger than the sum of its proper divisors (1).

12156553 is an equidigital number, since it uses as much as digits as its factorization.

12156553 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4500, while the sum is 28.

The square root of 12156553 is about 3486.6248722798. The cubic root of 12156553 is about 229.9341525427.

The spelling of 12156553 in words is "twelve million, one hundred fifty-six thousand, five hundred fifty-three".