12495909 has 4 divisors (see below), whose sum is σ = 16661216. Its totient is φ = 8330604.

The previous prime is 12495893. The next prime is 12495913. The reversal of 12495909 is 90959421.

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.

It is not a de Polignac number, because 12495909 - 2⁴ = 12495893 is a prime.

It is a super-2 number, since 2×12495909² = 312295483472562, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12495949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2082649 + ... + 2082654.

It is an arithmetic number, because the mean of its divisors is an integer number (4165304).

Almost surely, 2^12495909 is an apocalyptic number.

It is an amenable number.

12495909 is a deficient number, since it is larger than the sum of its proper divisors (4165307).

12495909 is an equidigital number, since it uses as much as digits as its factorization.

12495909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4165306.

The product of its (nonzero) digits is 29160, while the sum is 39.

The square root of 12495909 is about 3534.9553038193. The cubic root of 12495909 is about 232.0541205982.

The spelling of 12495909 in words is "twelve million, four hundred ninety-five thousand, nine hundred nine".