11554921 has 4 divisors (see below), whose sum is σ = 13205632. Its totient is φ = 9904212.

The previous prime is 11554913. The next prime is 11554937. The reversal of 11554921 is 12945511.

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.

It is a cyclic number.

It is not a de Polignac number, because 11554921 - 2³ = 11554913 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11554921.

It is not an unprimeable number, because it can be changed into a prime (11554021) 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, 825345 + ... + 825358.

It is an arithmetic number, because the mean of its divisors is an integer number (3301408).

Almost surely, 2^11554921 is an apocalyptic number.

It is an amenable number.

11554921 is a deficient number, since it is larger than the sum of its proper divisors (1650711).

11554921 is an equidigital number, since it uses as much as digits as its factorization.

11554921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650710.

The product of its digits is 1800, while the sum is 28.

The square root of 11554921 is about 3399.2530061765. The cubic root of 11554921 is about 226.0766244994.

The spelling of 11554921 in words is "eleven million, five hundred fifty-four thousand, nine hundred twenty-one".