12825978 has 32 divisors (see below), whose sum is σ = 28112832. Its totient is φ = 3868800.

The previous prime is 12825977. The next prime is 12825979. The reversal of 12825978 is 87952821.

It is an interprime number because it is at equal distance from previous prime (12825977) and next prime (12825979).

It is not an unprimeable number, because it can be changed into a prime (12825977) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24358 + ... + 24878.

It is an arithmetic number, because the mean of its divisors is an integer number (878526).

Almost surely, 2^12825978 is an apocalyptic number.

12825978 is an abundant number, since it is smaller than the sum of its proper divisors (15286854).

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

12825978 is a wasteful number, since it uses less digits than its factorization.

12825978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 910.

The product of its digits is 80640, while the sum is 42.

The square root of 12825978 is about 3581.3374596650. The cubic root of 12825978 is about 234.0795623963.

Multiplying 12825978 by its sum of digits (42), we get a triangular number (538691076 = T₃₂₈₂₃).

It can be divided in two parts, 1282 and 5978, that added together give a triangular number (7260 = T₁₂₀).

The spelling of 12825978 in words is "twelve million, eight hundred twenty-five thousand, nine hundred seventy-eight".