12511949 has 4 divisors (see below), whose sum is σ = 13247964. Its totient is φ = 11775936.

The previous prime is 12511909. The next prime is 12511951. The reversal of 12511949 is 94911521.

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 3541924 + 8970025 = 1882^2 + 2995^2 .

It is a cyclic number.

It is not a de Polignac number, because 12511949 - 2²⁰ = 11463373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12511909) 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, 367982 + ... + 368015.

It is an arithmetic number, because the mean of its divisors is an integer number (3311991).

Almost surely, 2^12511949 is an apocalyptic number.

It is an amenable number.

12511949 is a deficient number, since it is larger than the sum of its proper divisors (736015).

12511949 is an equidigital number, since it uses as much as digits as its factorization.

12511949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 736014.

The product of its digits is 3240, while the sum is 32.

The square root of 12511949 is about 3537.2233460725. The cubic root of 12511949 is about 232.1533679231.

The spelling of 12511949 in words is "twelve million, five hundred eleven thousand, nine hundred forty-nine".