12298891 has 4 divisors (see below), whose sum is σ = 13416984. Its totient is φ = 11180800.

The previous prime is 12298883. The next prime is 12298919. The reversal of 12298891 is 19889221.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12298891 - 2³ = 12298883 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12298801) 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, 559030 + ... + 559051.

It is an arithmetic number, because the mean of its divisors is an integer number (3354246).

Almost surely, 2^12298891 is an apocalyptic number.

12298891 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12298891 is a deficient number, since it is larger than the sum of its proper divisors (1118093).

12298891 is a wasteful number, since it uses less digits than its factorization.

12298891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1118092.

The product of its digits is 20736, while the sum is 40.

The square root of 12298891 is about 3506.9774735518. The cubic root of 12298891 is about 230.8280862047.

The spelling of 12298891 in words is "twelve million, two hundred ninety-eight thousand, eight hundred ninety-one".