12261915 has 32 divisors (see below), whose sum is σ = 22171200. Its totient is φ = 6428160.

The previous prime is 12261901. The next prime is 12261919. The reversal of 12261915 is 51916221.

It is not a de Polignac number, because 12261915 - 2⁸ = 12261659 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12261919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 7491 + ... + 8979.

It is an arithmetic number, because the mean of its divisors is an integer number (692850).

Almost surely, 2^12261915 is an apocalyptic number.

12261915 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12261915 is a deficient number, since it is larger than the sum of its proper divisors (9909285).

12261915 is a wasteful number, since it uses less digits than its factorization.

12261915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564 (or 1558 counting only the distinct ones).

The product of its digits is 1080, while the sum is 27.

The square root of 12261915 is about 3501.7017291597. The cubic root of 12261915 is about 230.5965296338.

The spelling of 12261915 in words is "twelve million, two hundred sixty-one thousand, nine hundred fifteen".