12270645 has 24 divisors (see below), whose sum is σ = 21355776. Its totient is φ = 6517728.

The previous prime is 12270641. The next prime is 12270647. The reversal of 12270645 is 54607221.

12270645 is a `hidden beast` number, since 12 + 2 + 7 + 0 + 645 = 666.

It is not a de Polignac number, because 12270645 - 2² = 12270641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12270641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16144 + ... + 16886.

It is an arithmetic number, because the mean of its divisors is an integer number (889824).

Almost surely, 2^12270645 is an apocalyptic number.

12270645 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

12270645 is a deficient number, since it is larger than the sum of its proper divisors (9085131).

12270645 is a wasteful number, since it uses less digits than its factorization.

12270645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1121 (or 1118 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 12270645 is about 3502.9480441480. The cubic root of 12270645 is about 230.6512418638.

Adding to 12270645 its reverse (54607221), we get a palindrome (66877866).

The spelling of 12270645 in words is "twelve million, two hundred seventy thousand, six hundred forty-five".