11621421 has 32 divisors (see below), whose sum is σ = 20839680. Its totient is φ = 6248448.

The previous prime is 11621419. The next prime is 11621437. The reversal of 11621421 is 12412611.

11621421 is a `hidden beast` number, since 1 + 1 + 621 + 42 + 1 = 666.

11621421 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 11621421 - 2¹ = 11621419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11621394 and 11621403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11621461) 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 in 31 ways as a sum of consecutive naturals, for example, 1405 + ... + 5021.

It is an arithmetic number, because the mean of its divisors is an integer number (651240).

Almost surely, 2^11621421 is an apocalyptic number.

It is an amenable number.

11621421 is a deficient number, since it is larger than the sum of its proper divisors (9218259).

11621421 is a wasteful number, since it uses less digits than its factorization.

11621421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3650 (or 3644 counting only the distinct ones).

The product of its digits is 96, while the sum is 18.

The square root of 11621421 is about 3409.0205338191. The cubic root of 11621421 is about 226.5094947996.

The spelling of 11621421 in words is "eleven million, six hundred twenty-one thousand, four hundred twenty-one".