12622618 has 4 divisors (see below), whose sum is σ = 18933930. Its totient is φ = 6311308.

The previous prime is 12622609. The next prime is 12622633. The reversal of 12622618 is 81622621.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81622621 = 3779 ⋅21599.

It can be written as a sum of positive squares in only one way, i.e., 11675889 + 946729 = 3417^2 + 973^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3155653 + ... + 3155656.

Almost surely, 2^12622618 is an apocalyptic number.

12622618 is a deficient number, since it is larger than the sum of its proper divisors (6311312).

12622618 is an equidigital number, since it uses as much as digits as its factorization.

12622618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6311311.

The product of its digits is 2304, while the sum is 28.

The square root of 12622618 is about 3552.8323912056. The cubic root of 12622618 is about 232.8358302491.

The spelling of 12622618 in words is "twelve million, six hundred twenty-two thousand, six hundred eighteen".