12912049 has 4 divisors (see below), whose sum is σ = 12921840. Its totient is φ = 12902260.

The previous prime is 12912043. The next prime is 12912073. The reversal of 12912049 is 94021921.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12912049 - 2³ = 12912041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12912041) 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, 2539 + ... + 5680.

It is an arithmetic number, because the mean of its divisors is an integer number (3230460).

Almost surely, 2^12912049 is an apocalyptic number.

It is an amenable number.

12912049 is a deficient number, since it is larger than the sum of its proper divisors (9791).

12912049 is an equidigital number, since it uses as much as digits as its factorization.

12912049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9790.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 12912049 is about 3593.3339672232. Note that the first 3 decimals coincide. The cubic root of 12912049 is about 234.6020062879.

The spelling of 12912049 in words is "twelve million, nine hundred twelve thousand, forty-nine".