12645605 has 16 divisors (see below), whose sum is σ = 17629824. Its totient is φ = 8527680.

The previous prime is 12645547. The next prime is 12645623. The reversal of 12645605 is 50654621.

12645605 = 584² + 585² + ... + 618².

12645605 is digitally balanced in base 2 and base 8, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12645605 - 2¹² = 12641509 is a prime.

It is a super-2 number, since 2×12645605² = 319822651632050, which contains 22 as substring.

It is a Duffinian number.

12645605 is strictly pandigital in base 8.

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, 827 + ... + 5096.

It is an arithmetic number, because the mean of its divisors is an integer number (1101864).

Almost surely, 2^12645605 is an apocalyptic number.

It is an amenable number.

12645605 is a deficient number, since it is larger than the sum of its proper divisors (4984219).

12645605 is an equidigital number, since it uses as much as digits as its factorization.

12645605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5996.

The product of its (nonzero) digits is 7200, while the sum is 29.

The square root of 12645605 is about 3556.0659442704. The cubic root of 12645605 is about 232.9770833436.

The spelling of 12645605 in words is "twelve million, six hundred forty-five thousand, six hundred five".