12502909 has 4 divisors (see below), whose sum is σ = 12807900. Its totient is φ = 12197920.

The previous prime is 12502873. The next prime is 12502921. The reversal of 12502909 is 90920521.

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 1092025 + 11410884 = 1045^2 + 3378^2 .

It is a cyclic number.

It is not a de Polignac number, because 12502909 - 2¹³ = 12494717 is a prime.

It is a super-3 number, since 3×12502909³ (a number of 22 digits) contains 333 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 (12502109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 152434 + ... + 152515.

It is an arithmetic number, because the mean of its divisors is an integer number (3201975).

Almost surely, 2^12502909 is an apocalyptic number.

It is an amenable number.

12502909 is a deficient number, since it is larger than the sum of its proper divisors (304991).

12502909 is an equidigital number, since it uses as much as digits as its factorization.

12502909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304990.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 12502909 is about 3535.9452767259. The cubic root of 12502909 is about 232.0974434601.

The spelling of 12502909 in words is "twelve million, five hundred two thousand, nine hundred nine".