12164945 has 32 divisors (see below), whose sum is σ = 16964640. Its totient is φ = 8294400.

The previous prime is 12164941. The next prime is 12164951. The reversal of 12164945 is 54946121.

It can be written as a sum of positive squares in 16 ways, for example, as 165649 + 11999296 = 407^2 + 3464^2 .

It is not a de Polignac number, because 12164945 - 2² = 12164941 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12164941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111551 + ... + 111659.

It is an arithmetic number, because the mean of its divisors is an integer number (530145).

Almost surely, 2^12164945 is an apocalyptic number.

It is an amenable number.

12164945 is a deficient number, since it is larger than the sum of its proper divisors (4799695).

12164945 is a wasteful number, since it uses less digits than its factorization.

12164945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245.

The product of its digits is 8640, while the sum is 32.

The square root of 12164945 is about 3487.8281207651. The cubic root of 12164945 is about 229.9870503106.

The spelling of 12164945 in words is "twelve million, one hundred sixty-four thousand, nine hundred forty-five".