12553166 has 4 divisors (see below), whose sum is σ = 18829752. Its totient is φ = 6276582.

The previous prime is 12553159. The next prime is 12553199. The reversal of 12553166 is 66135521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66135521 = 461 ⋅143461.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3138290 + ... + 3138293.

It is an arithmetic number, because the mean of its divisors is an integer number (4707438).

Almost surely, 2^12553166 is an apocalyptic number.

12553166 is a deficient number, since it is larger than the sum of its proper divisors (6276586).

12553166 is an equidigital number, since it uses as much as digits as its factorization.

12553166 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6276585.

The product of its digits is 5400, while the sum is 29.

The square root of 12553166 is about 3543.0447358169. The cubic root of 12553166 is about 232.4080092393.

Adding to 12553166 its reverse (66135521), we get a palindrome (78688687).

The spelling of 12553166 in words is "twelve million, five hundred fifty-three thousand, one hundred sixty-six".