12735881 has 4 divisors (see below), whose sum is σ = 13080132. Its totient is φ = 12391632.

The previous prime is 12735841. The next prime is 12735883. The reversal of 12735881 is 18853721.

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

It can be written as a sum of positive squares in 2 ways, for example, as 7376656 + 5359225 = 2716^2 + 2315^2 .

It is a cyclic number.

It is not a de Polignac number, because 12735881 - 2¹⁸ = 12473737 is a prime.

It is a super-2 number, since 2×12735881² = 324405329692322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12735883) 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, 172070 + ... + 172143.

It is an arithmetic number, because the mean of its divisors is an integer number (3270033).

Almost surely, 2^12735881 is an apocalyptic number.

It is an amenable number.

12735881 is a deficient number, since it is larger than the sum of its proper divisors (344251).

12735881 is an equidigital number, since it uses as much as digits as its factorization.

12735881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344250.

The product of its digits is 13440, while the sum is 35.

The square root of 12735881 is about 3568.7366111833. The cubic root of 12735881 is about 233.5301710911.

The spelling of 12735881 in words is "twelve million, seven hundred thirty-five thousand, eight hundred eighty-one".