11611621 has 8 divisors (see below), whose sum is σ = 13327424. Its totient is φ = 9910080.

The previous prime is 11611609. The next prime is 11611627. The reversal of 11611621 is 12611611.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11611621 - 2¹³ = 11603429 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 (11611627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1755 + ... + 5128.

It is an arithmetic number, because the mean of its divisors is an integer number (1665928).

Almost surely, 2^11611621 is an apocalyptic number.

It is an amenable number.

11611621 is a deficient number, since it is larger than the sum of its proper divisors (1715803).

11611621 is an equidigital number, since it uses as much as digits as its factorization.

11611621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7131.

The product of its digits is 72, while the sum is 19.

The square root of 11611621 is about 3407.5828676644. The cubic root of 11611621 is about 226.4458073124.

The spelling of 11611621 in words is "eleven million, six hundred eleven thousand, six hundred twenty-one".