12645390 has 32 divisors (see below), whose sum is σ = 30597120. Its totient is φ = 3344544.

The previous prime is 12645389. The next prime is 12645401. The reversal of 12645390 is 9354621.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2151 + ... + 5469.

It is an arithmetic number, because the mean of its divisors is an integer number (956160).

Almost surely, 2^12645390 is an apocalyptic number.

12645390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12645390 is an abundant number, since it is smaller than the sum of its proper divisors (17951730).

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

12645390 is a wasteful number, since it uses less digits than its factorization.

12645390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3456.

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 12645390 is about 3556.0357141064. The cubic root of 12645390 is about 232.9757629808.

The spelling of 12645390 in words is "twelve million, six hundred forty-five thousand, three hundred ninety".