12130945 has 16 divisors (see below), whose sum is σ = 15776640. Its totient is φ = 8918784.

The previous prime is 12130907. The next prime is 12130973. The reversal of 12130945 is 54903121.

12130945 = 510² + 511² + ... + 552².

It is a cyclic number.

It is not a de Polignac number, because 12130945 - 2²³ = 3742337 is a prime.

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, 1996 + ... + 5314.

It is an arithmetic number, because the mean of its divisors is an integer number (986040).

Almost surely, 2^12130945 is an apocalyptic number.

It is an amenable number.

12130945 is a deficient number, since it is larger than the sum of its proper divisors (3645695).

12130945 is a wasteful number, since it uses less digits than its factorization.

12130945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3384.

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 12130945 is about 3482.9506169339. The cubic root of 12130945 is about 229.7725855501.

The spelling of 12130945 in words is "twelve million, one hundred thirty thousand, nine hundred forty-five".