11455621 has 4 divisors (see below), whose sum is σ = 11466252. Its totient is φ = 11444992.

The previous prime is 11455597. The next prime is 11455649. The reversal of 11455621 is 12655411.

It is a happy number.

11455621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 8850625 + 2604996 = 2975^2 + 1614^2 .

It is a cyclic number.

It is not a de Polignac number, because 11455621 - 2⁵ = 11455589 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11455121) 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, 3490 + ... + 5923.

It is an arithmetic number, because the mean of its divisors is an integer number (2866563).

Almost surely, 2^11455621 is an apocalyptic number.

It is an amenable number.

11455621 is a deficient number, since it is larger than the sum of its proper divisors (10631).

11455621 is an equidigital number, since it uses as much as digits as its factorization.

11455621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10630.

The product of its digits is 1200, while the sum is 25.

The square root of 11455621 is about 3384.6153400350. The cubic root of 11455621 is about 225.4271457840.

The spelling of 11455621 in words is "eleven million, four hundred fifty-five thousand, six hundred twenty-one".