12113409 has 32 divisors (see below), whose sum is σ = 20643840. Its totient is φ = 6134400.

The previous prime is 12113407. The next prime is 12113417. The reversal of 12113409 is 90431121.

It is not a de Polignac number, because 12113409 - 2¹ = 12113407 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (12113407) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 8832 + ... + 10110.

It is an arithmetic number, because the mean of its divisors is an integer number (645120).

Almost surely, 2^12113409 is an apocalyptic number.

It is an amenable number.

12113409 is a deficient number, since it is larger than the sum of its proper divisors (8530431).

12113409 is a wasteful number, since it uses less digits than its factorization.

12113409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1341.

The product of its (nonzero) digits is 216, while the sum is 21.

The square root of 12113409 is about 3480.4323007351. The cubic root of 12113409 is about 229.6618155277.

It can be divided in two parts, 121 and 13409, that added together give a triangular number (13530 = T₁₆₄).

The spelling of 12113409 in words is "twelve million, one hundred thirteen thousand, four hundred nine".