12939858 has 32 divisors (see below), whose sum is σ = 29750400. Its totient is φ = 4164048.

The previous prime is 12939851. The next prime is 12939859. The reversal of 12939858 is 85893921.

It is a happy number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12939851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2566 + ... + 5697.

It is an arithmetic number, because the mean of its divisors is an integer number (929700).

Almost surely, 2^12939858 is an apocalyptic number.

12939858 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

12939858 is an abundant number, since it is smaller than the sum of its proper divisors (16810542).

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

12939858 is a wasteful number, since it uses less digits than its factorization.

12939858 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8303 (or 8297 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 12939858 is about 3597.2014122092. The cubic root of 12939858 is about 234.7703082391.

The spelling of 12939858 in words is "twelve million, nine hundred thirty-nine thousand, eight hundred fifty-eight".