12164557 has 2 divisors, whose sum is σ = 12164558. Its totient is φ = 12164556.

The previous prime is 12164549. The next prime is 12164567. The reversal of 12164557 is 75546121.

12164557 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8964036 + 3200521 = 2994^2 + 1789^2 .

It is a cyclic number.

It is not a de Polignac number, because 12164557 - 2³ = 12164549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12164567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6082278 + 6082279.

It is an arithmetic number, because the mean of its divisors is an integer number (6082279).

Almost surely, 2^12164557 is an apocalyptic number.

It is an amenable number.

12164557 is a deficient number, since it is larger than the sum of its proper divisors (1).

12164557 is an equidigital number, since it uses as much as digits as its factorization.

12164557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8400, while the sum is 31.

The square root of 12164557 is about 3487.7724983146. The cubic root of 12164557 is about 229.9846051448.

It can be divided in two parts, 12164 and 557, that added together give a palindrome (12721).

The spelling of 12164557 in words is "twelve million, one hundred sixty-four thousand, five hundred fifty-seven".