12509739 has 24 divisors (see below), whose sum is σ = 20874672. Its totient is φ = 7134720.

The previous prime is 12509719. The next prime is 12509741. The reversal of 12509739 is 93790521.

12509739 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12509739 - 2⁷ = 12509611 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12509719) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2034 + ... + 5399.

It is an arithmetic number, because the mean of its divisors is an integer number (869778).

Almost surely, 2^12509739 is an apocalyptic number.

12509739 is a deficient number, since it is larger than the sum of its proper divisors (8364933).

12509739 is a wasteful number, since it uses less digits than its factorization.

12509739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7467 (or 7464 counting only the distinct ones).

The product of its (nonzero) digits is 17010, while the sum is 36.

The square root of 12509739 is about 3536.9109403546. The cubic root of 12509739 is about 232.1396986124.

The spelling of 12509739 in words is "twelve million, five hundred nine thousand, seven hundred thirty-nine".