12981858 has 16 divisors (see below), whose sum is σ = 26023680. Its totient is φ = 4317296.

The previous prime is 12981851. The next prime is 12981869. The reversal of 12981858 is 85818921.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between odd and even.

It is not an unprimeable number, because it can be changed into a prime (12981851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 616 + ... + 5132.

It is an arithmetic number, because the mean of its divisors is an integer number (1626480).

Almost surely, 2^12981858 is an apocalyptic number.

12981858 is an abundant number, since it is smaller than the sum of its proper divisors (13041822).

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

12981858 is a wasteful number, since it uses less digits than its factorization.

12981858 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5001.

The product of its digits is 46080, while the sum is 42.

The square root of 12981858 is about 3603.0345543722. The cubic root of 12981858 is about 235.0240385852.

The spelling of 12981858 in words is "twelve million, nine hundred eighty-one thousand, eight hundred fifty-eight".