12790945 has 4 divisors (see below), whose sum is σ = 15349140. Its totient is φ = 10232752.

The previous prime is 12790931. The next prime is 12790949. The reversal of 12790945 is 54909721.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3500641 + 9290304 = 1871^2 + 3048^2 .

It is a cyclic number.

It is not a de Polignac number, because 12790945 - 2⁵ = 12790913 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12790949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1279090 + ... + 1279099.

It is an arithmetic number, because the mean of its divisors is an integer number (3837285).

Almost surely, 2^12790945 is an apocalyptic number.

It is an amenable number.

12790945 is a deficient number, since it is larger than the sum of its proper divisors (2558195).

12790945 is an equidigital number, since it uses as much as digits as its factorization.

12790945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2558194.

The product of its (nonzero) digits is 22680, while the sum is 37.

The square root of 12790945 is about 3576.4430653933. The cubic root of 12790945 is about 233.8662456684.

The spelling of 12790945 in words is "twelve million, seven hundred ninety thousand, nine hundred forty-five".