11626721 has 2 divisors, whose sum is σ = 11626722. Its totient is φ = 11626720.

The previous prime is 11626673. The next prime is 11626729. The reversal of 11626721 is 12762611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10336225 + 1290496 = 3215^2 + 1136^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11626721 is a prime.

It is not a weakly prime, because it can be changed into another prime (11626729) 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 as a sum of consecutive naturals, namely, 5813360 + 5813361.

It is an arithmetic number, because the mean of its divisors is an integer number (5813361).

Almost surely, 2^11626721 is an apocalyptic number.

It is an amenable number.

11626721 is a deficient number, since it is larger than the sum of its proper divisors (1).

11626721 is an equidigital number, since it uses as much as digits as its factorization.

11626721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1008, while the sum is 26.

The square root of 11626721 is about 3409.7977945913. The cubic root of 11626721 is about 226.5439231158.

The spelling of 11626721 in words is "eleven million, six hundred twenty-six thousand, seven hundred twenty-one".