12611391 has 8 divisors (see below), whose sum is σ = 18108720. Its totient is φ = 7760832.

The previous prime is 12611387. The next prime is 12611393. The reversal of 12611391 is 19311621.

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

It is not a de Polignac number, because 12611391 - 2² = 12611387 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12611393) 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, 161646 + ... + 161723.

It is an arithmetic number, because the mean of its divisors is an integer number (2263590).

Almost surely, 2^12611391 is an apocalyptic number.

12611391 is a deficient number, since it is larger than the sum of its proper divisors (5497329).

12611391 is a wasteful number, since it uses less digits than its factorization.

12611391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323385.

The product of its digits is 324, while the sum is 24.

The square root of 12611391 is about 3551.2520327344. The cubic root of 12611391 is about 232.7667789831.

The spelling of 12611391 in words is "twelve million, six hundred eleven thousand, three hundred ninety-one".