12768531 has 8 divisors (see below), whose sum is σ = 17091984. Its totient is φ = 8478720.

The previous prime is 12768517. The next prime is 12768583. The reversal of 12768531 is 13586721.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 12768531 - 2⁶ = 12768467 is a prime.

It is a super-2 number, since 2×12768531² = 326070767795922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12768492 and 12768501.

It is not an unprimeable number, because it can be changed into a prime (12768031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7510 + ... + 9051.

It is an arithmetic number, because the mean of its divisors is an integer number (2136498).

Almost surely, 2^12768531 is an apocalyptic number.

12768531 is a deficient number, since it is larger than the sum of its proper divisors (4323453).

12768531 is a wasteful number, since it uses less digits than its factorization.

12768531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16821.

The product of its digits is 10080, while the sum is 33.

The square root of 12768531 is about 3573.3081311300. The cubic root of 12768531 is about 233.7295619218.

The spelling of 12768531 in words is "twelve million, seven hundred sixty-eight thousand, five hundred thirty-one".