12352391 has 4 divisors (see below), whose sum is σ = 12360072. Its totient is φ = 12344712.

The previous prime is 12352381. The next prime is 12352397. The reversal of 12352391 is 19325321.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12352391 - 2¹⁴ = 12336007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12352391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12352397) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 401 + ... + 4986.

It is an arithmetic number, because the mean of its divisors is an integer number (3090018).

Almost surely, 2^12352391 is an apocalyptic number.

12352391 is a deficient number, since it is larger than the sum of its proper divisors (7681).

12352391 is an equidigital number, since it uses as much as digits as its factorization.

12352391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7680.

The product of its digits is 1620, while the sum is 26.

The square root of 12352391 is about 3514.5968474350. The cubic root of 12352391 is about 231.1623016862.

The spelling of 12352391 in words is "twelve million, three hundred fifty-two thousand, three hundred ninety-one".