12266557 has 4 divisors (see below), whose sum is σ = 12275836. Its totient is φ = 12257280.

The previous prime is 12266543. The next prime is 12266581. The reversal of 12266557 is 75566221.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 5433561 + 6832996 = 2331^2 + 2614^2 .

It is a cyclic number.

It is not a de Polignac number, because 12266557 - 2¹⁵ = 12233789 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12266357) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2244 + ... + 5437.

It is an arithmetic number, because the mean of its divisors is an integer number (3068959).

Almost surely, 2^12266557 is an apocalyptic number.

It is an amenable number.

12266557 is a deficient number, since it is larger than the sum of its proper divisors (9279).

12266557 is an equidigital number, since it uses as much as digits as its factorization.

12266557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9278.

The product of its digits is 25200, while the sum is 34.

The square root of 12266557 is about 3502.3644870287. The cubic root of 12266557 is about 230.6256249815.

The spelling of 12266557 in words is "twelve million, two hundred sixty-six thousand, five hundred fifty-seven".