12249915 has 16 divisors (see below), whose sum is σ = 20452608. Its totient is φ = 6249056.

The previous prime is 12249907. The next prime is 12249917. The reversal of 12249915 is 51994221.

It is a cyclic number.

It is not a de Polignac number, because 12249915 - 2³ = 12249907 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (12249917) 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, 17409 + ... + 18098.

It is an arithmetic number, because the mean of its divisors is an integer number (1278288).

Almost surely, 2^12249915 is an apocalyptic number.

12249915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12249915 is a deficient number, since it is larger than the sum of its proper divisors (8202693).

12249915 is a wasteful number, since it uses less digits than its factorization.

12249915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35538.

The product of its digits is 6480, while the sum is 33.

The square root of 12249915 is about 3499.9878571218. The cubic root of 12249915 is about 230.5212814220.

The spelling of 12249915 in words is "twelve million, two hundred forty-nine thousand, nine hundred fifteen".