12803661 has 12 divisors (see below), whose sum is σ = 19916988. Its totient is φ = 7879104.

The previous prime is 12803657. The next prime is 12803671. The reversal of 12803661 is 16630821.

It can be written as a sum of positive squares in 2 ways, for example, as 7257636 + 5546025 = 2694^2 + 2355^2 .

It is not a de Polignac number, because 12803661 - 2² = 12803657 is a prime.

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 not an unprimeable number, because it can be changed into a prime (12803611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54600 + ... + 54833.

It is an arithmetic number, because the mean of its divisors is an integer number (1659749).

Almost surely, 2^12803661 is an apocalyptic number.

It is an amenable number.

12803661 is a deficient number, since it is larger than the sum of its proper divisors (7113327).

12803661 is a wasteful number, since it uses less digits than its factorization.

12803661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109452 (or 109449 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 12803661 is about 3578.2203677247. The cubic root of 12803661 is about 233.9437186581.

The spelling of 12803661 in words is "twelve million, eight hundred three thousand, six hundred sixty-one".