12617381 has 8 divisors (see below), whose sum is σ = 14771904. Its totient is φ = 10550880.

The previous prime is 12617377. The next prime is 12617401. The reversal of 12617381 is 18371621.

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

It is a cyclic number.

It is not a de Polignac number, because 12617381 - 2² = 12617377 is a prime.

It is a super-2 number, since 2×12617381² = 318396606598322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12617321) 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, 21695 + ... + 22268.

It is an arithmetic number, because the mean of its divisors is an integer number (1846488).

Almost surely, 2^12617381 is an apocalyptic number.

It is an amenable number.

12617381 is a deficient number, since it is larger than the sum of its proper divisors (2154523).

12617381 is an equidigital number, since it uses as much as digits as its factorization.

12617381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44011.

The product of its digits is 2016, while the sum is 29.

The square root of 12617381 is about 3552.0952971451. The cubic root of 12617381 is about 232.8036253633.

The spelling of 12617381 in words is "twelve million, six hundred seventeen thousand, three hundred eighty-one".