12748881 has 4 divisors (see below), whose sum is σ = 16998512. Its totient is φ = 8499252.

The previous prime is 12748859. The next prime is 12748903. The reversal of 12748881 is 18884721.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (12748859) and next prime (12748903).

It is not a de Polignac number, because 12748881 - 2⁹ = 12748369 is a prime.

It is a super-2 number, since 2×12748881² = 325067933504322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12748811) 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, 2124811 + ... + 2124816.

It is an arithmetic number, because the mean of its divisors is an integer number (4249628).

Almost surely, 2^12748881 is an apocalyptic number.

It is an amenable number.

12748881 is a deficient number, since it is larger than the sum of its proper divisors (4249631).

12748881 is an equidigital number, since it uses as much as digits as its factorization.

12748881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4249630.

The product of its digits is 28672, while the sum is 39.

The square root of 12748881 is about 3570.5575194919. The cubic root of 12748881 is about 233.6096017919.

The spelling of 12748881 in words is "twelve million, seven hundred forty-eight thousand, eight hundred eighty-one".