12417381 has 20 divisors (see below), whose sum is σ = 18783072. Its totient is φ = 8174088.

The previous prime is 12417347. The next prime is 12417397. The reversal of 12417381 is 18371421.

It is not a de Polignac number, because 12417381 - 2⁷ = 12417253 is a prime.

It is a super-2 number, since 2×12417381² = 308382701798322, which contains 22 as substring.

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

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12417331) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 5800 + ... + 7646.

Almost surely, 2^12417381 is an apocalyptic number.

It is an amenable number.

12417381 is a deficient number, since it is larger than the sum of its proper divisors (6365691).

12417381 is an equidigital number, since it uses as much as digits as its factorization.

12417381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1942 (or 1933 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 12417381 is about 3523.8304442751. The cubic root of 12417381 is about 231.5669997814.

The spelling of 12417381 in words is "twelve million, four hundred seventeen thousand, three hundred eighty-one".