12798431 has 4 divisors (see below), whose sum is σ = 12819792. Its totient is φ = 12777072.

The previous prime is 12798427. The next prime is 12798449. The reversal of 12798431 is 13489721.

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 12798431 - 2² = 12798427 is a prime.

It is a super-2 number, since 2×12798431² = 327599672123522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12798391 and 12798400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12798421) 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, 9755 + ... + 10988.

It is an arithmetic number, because the mean of its divisors is an integer number (3204948).

Almost surely, 2^12798431 is an apocalyptic number.

12798431 is a deficient number, since it is larger than the sum of its proper divisors (21361).

12798431 is an equidigital number, since it uses as much as digits as its factorization.

12798431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21360.

The product of its digits is 12096, while the sum is 35.

The square root of 12798431 is about 3577.4894828636. The cubic root of 12798431 is about 233.9118607835.

The spelling of 12798431 in words is "twelve million, seven hundred ninety-eight thousand, four hundred thirty-one".