12731076 has 18 divisors (see below), whose sum is σ = 32181422. Its totient is φ = 4243680.

The previous prime is 12731063. The next prime is 12731093. The reversal of 12731076 is 67013721.

It can be written as a sum of positive squares in only one way, i.e., 6380676 + 6350400 = 2526^2 + 2520^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×12731076² = 324160592235552, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 176785 + ... + 176856.

Almost surely, 2^12731076 is an apocalyptic number.

It is an amenable number.

12731076 is an abundant number, since it is smaller than the sum of its proper divisors (19450346).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12731076 is a wasteful number, since it uses less digits than its factorization.

12731076 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 353651 (or 353646 counting only the distinct ones).

The product of its (nonzero) digits is 1764, while the sum is 27.

The square root of 12731076 is about 3568.0633402450. The cubic root of 12731076 is about 233.5007986009.

Adding to 12731076 its reverse (67013721), we get a palindrome (79744797).

The spelling of 12731076 in words is "twelve million, seven hundred thirty-one thousand, seventy-six".