12453891 has 4 divisors (see below), whose sum is σ = 16605192. Its totient is φ = 8302592.

The previous prime is 12453869. The next prime is 12453899. The reversal of 12453891 is 19835421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19835421 = 3 ⋅6611807.

It is a cyclic number.

It is not a de Polignac number, because 12453891 - 2⁶ = 12453827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12453899) 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, 2075646 + ... + 2075651.

It is an arithmetic number, because the mean of its divisors is an integer number (4151298).

Almost surely, 2^12453891 is an apocalyptic number.

12453891 is a deficient number, since it is larger than the sum of its proper divisors (4151301).

12453891 is an equidigital number, since it uses as much as digits as its factorization.

12453891 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4151300.

The product of its digits is 8640, while the sum is 33.

The square root of 12453891 is about 3529.0070841527. The cubic root of 12453891 is about 231.7937313977.

The spelling of 12453891 in words is "twelve million, four hundred fifty-three thousand, eight hundred ninety-one".