12609558 has 24 divisors (see below), whose sum is σ = 29422848. Its totient is φ = 3879792.

The previous prime is 12609551. The next prime is 12609587. The reversal of 12609558 is 85590621.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12609551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26710 + ... + 27177.

It is an arithmetic number, because the mean of its divisors is an integer number (1225952).

Almost surely, 2^12609558 is an apocalyptic number.

12609558 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12609558 is an abundant number, since it is smaller than the sum of its proper divisors (16813290).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12609558 is a wasteful number, since it uses less digits than its factorization.

12609558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53908 (or 53905 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 12609558 is about 3550.9939453623. The cubic root of 12609558 is about 232.7555012904.

The spelling of 12609558 in words is "twelve million, six hundred nine thousand, five hundred fifty-eight".