11621641 has 4 divisors (see below), whose sum is σ = 11631232. Its totient is φ = 11612052.

The previous prime is 11621639. The next prime is 11621657. The reversal of 11621641 is 14612611.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 11621641 - 2¹ = 11621639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11621671) 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, 2661 + ... + 5506.

It is an arithmetic number, because the mean of its divisors is an integer number (2907808).

Almost surely, 2^11621641 is an apocalyptic number.

It is an amenable number.

11621641 is a deficient number, since it is larger than the sum of its proper divisors (9591).

11621641 is an equidigital number, since it uses as much as digits as its factorization.

11621641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9590.

The product of its digits is 288, while the sum is 22.

The square root of 11621641 is about 3409.0528009991. The cubic root of 11621641 is about 226.5109241077.

The spelling of 11621641 in words is "eleven million, six hundred twenty-one thousand, six hundred forty-one".