12520109 has 8 divisors (see below), whose sum is σ = 15150528. Its totient is φ = 10100160.

The previous prime is 12520099. The next prime is 12520111. The reversal of 12520109 is 90102521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12520109 - 2⁴ = 12520093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12520159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 52487 + ... + 52724.

It is an arithmetic number, because the mean of its divisors is an integer number (1893816).

Almost surely, 2^12520109 is an apocalyptic number.

It is an amenable number.

12520109 is a deficient number, since it is larger than the sum of its proper divisors (2630419).

12520109 is a wasteful number, since it uses less digits than its factorization.

12520109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105235.

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 12520109 is about 3538.3766051680. The cubic root of 12520109 is about 232.2038252848.

The spelling of 12520109 in words is "twelve million, five hundred twenty thousand, one hundred nine".