12956558 has 4 divisors (see below), whose sum is σ = 19434840. Its totient is φ = 6478278.

The previous prime is 12956509. The next prime is 12956563. The reversal of 12956558 is 85565921.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3239138 + ... + 3239141.

It is an arithmetic number, because the mean of its divisors is an integer number (4858710).

Almost surely, 2^12956558 is an apocalyptic number.

12956558 is a deficient number, since it is larger than the sum of its proper divisors (6478282).

12956558 is an equidigital number, since it uses as much as digits as its factorization.

12956558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6478281.

The product of its digits is 108000, while the sum is 41.

The square root of 12956558 is about 3599.5219126990. The cubic root of 12956558 is about 234.8712619153.

The spelling of 12956558 in words is "twelve million, nine hundred fifty-six thousand, five hundred fifty-eight".