12640411 has 4 divisors (see below), whose sum is σ = 14446192. Its totient is φ = 10834632.

The previous prime is 12640399. The next prime is 12640427. The reversal of 12640411 is 11404621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 12640411 - 2⁷ = 12640283 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12640451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 902880 + ... + 902893.

It is an arithmetic number, because the mean of its divisors is an integer number (3611548).

Almost surely, 2^12640411 is an apocalyptic number.

12640411 is a deficient number, since it is larger than the sum of its proper divisors (1805781).

12640411 is an equidigital number, since it uses as much as digits as its factorization.

12640411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1805780.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 12640411 is about 3555.3355678473. The cubic root of 12640411 is about 232.9451816490.

The spelling of 12640411 in words is "twelve million, six hundred forty thousand, four hundred eleven".