12743661 has 36 divisors (see below), whose sum is σ = 21006816. Its totient is φ = 6730560.

The previous prime is 12743641. The next prime is 12743663. The reversal of 12743661 is 16634721.

12743661 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12743661 - 2⁵ = 12743629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12743663) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 310801 + ... + 310841.

Almost surely, 2^12743661 is an apocalyptic number.

It is an amenable number.

12743661 is a deficient number, since it is larger than the sum of its proper divisors (8263155).

12743661 is an equidigital number, since it uses as much as digits as its factorization.

12743661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130 (or 70 counting only the distinct ones).

The product of its digits is 6048, while the sum is 30.

The square root of 12743661 is about 3569.8264663706. The cubic root of 12743661 is about 233.5777138013.

The spelling of 12743661 in words is "twelve million, seven hundred forty-three thousand, six hundred sixty-one".