12495509 has 16 divisors (see below), whose sum is σ = 14246400. Its totient is φ = 10893168.

The previous prime is 12495487. The next prime is 12495523. The reversal of 12495509 is 90559421.

It is not a de Polignac number, because 12495509 - 2⁸ = 12495253 is a prime.

It is a super-2 number, since 2×12495509² = 312275490338162, which contains 22 as substring.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12495569) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 158132 + ... + 158210.

It is an arithmetic number, because the mean of its divisors is an integer number (890400).

Almost surely, 2^12495509 is an apocalyptic number.

It is an amenable number.

12495509 is a deficient number, since it is larger than the sum of its proper divisors (1750891).

12495509 is an frugal number, since it uses more digits than its factorization.

12495509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161 (or 115 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 12495509 is about 3534.8987255648. The cubic root of 12495509 is about 232.0516445174.

The spelling of 12495509 in words is "twelve million, four hundred ninety-five thousand, five hundred nine".