12391357 has 16 divisors (see below), whose sum is σ = 14016960. Its totient is φ = 10857600.

The previous prime is 12391343. The next prime is 12391361. The reversal of 12391357 is 75319321.

It is a cyclic number.

It is not a de Polignac number, because 12391357 - 2¹⁹ = 11867069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12392357) 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, 39433 + ... + 39745.

It is an arithmetic number, because the mean of its divisors is an integer number (876060).

Almost surely, 2^12391357 is an apocalyptic number.

It is an amenable number.

12391357 is a deficient number, since it is larger than the sum of its proper divisors (1625603).

12391357 is a wasteful number, since it uses less digits than its factorization.

12391357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 444.

The product of its digits is 5670, while the sum is 31.

The square root of 12391357 is about 3520.1359348752. The cubic root of 12391357 is about 231.4051160899.

The spelling of 12391357 in words is "twelve million, three hundred ninety-one thousand, three hundred fifty-seven".