12145644 has 36 divisors (see below), whose sum is σ = 35088144. Its totient is φ = 3470112.

The previous prime is 12145607. The next prime is 12145669. The reversal of 12145644 is 44654121.

12145644 is a `hidden beast` number, since 1 + 2 + 14 + 5 + 644 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 23847 + ... + 24350.

Almost surely, 2^12145644 is an apocalyptic number.

12145644 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12145644 is an abundant number, since it is smaller than the sum of its proper divisors (22942500).

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

12145644 is a wasteful number, since it uses less digits than its factorization.

12145644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48214 (or 48209 counting only the distinct ones).

The product of its digits is 3840, while the sum is 27.

The square root of 12145644 is about 3485.0601142592. The cubic root of 12145644 is about 229.8653528219.

Adding to 12145644 its reverse (44654121), we get a palindrome (56799765).

The spelling of 12145644 in words is "twelve million, one hundred forty-five thousand, six hundred forty-four".