12356641 has 6 divisors (see below), whose sum is σ = 13582226. Its totient is φ = 11233200.

The previous prime is 12356633. The next prime is 12356647. The reversal of 12356641 is 14665321.

It can be written as a sum of positive squares in only one way, i.e., 6969600 + 5387041 = 2640^2 + 2321^2 .

It is not a de Polignac number, because 12356641 - 2³ = 12356633 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12356647) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 50940 + ... + 51181.

Almost surely, 2^12356641 is an apocalyptic number.

12356641 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12356641 is a deficient number, since it is larger than the sum of its proper divisors (1225585).

12356641 is a wasteful number, since it uses less digits than its factorization.

12356641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102143 (or 102132 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 12356641 is about 3515.2014167043. The cubic root of 12356641 is about 231.1888101068.

It can be divided in two parts, 12 and 356641, that added together give a palindrome (356653).

The spelling of 12356641 in words is "twelve million, three hundred fifty-six thousand, six hundred forty-one".