11549921 has 8 divisors (see below), whose sum is σ = 11844480. Its totient is φ = 11257488.

The previous prime is 11549903. The next prime is 11549939. The reversal of 11549921 is 12994511.

It is an interprime number because it is at equal distance from previous prime (11549903) and next prime (11549939).

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11549921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11549971) 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 7 ways as a sum of consecutive naturals, for example, 18350 + ... + 18968.

It is an arithmetic number, because the mean of its divisors is an integer number (1480560).

Almost surely, 2^11549921 is an apocalyptic number.

It is an amenable number.

11549921 is a deficient number, since it is larger than the sum of its proper divisors (294559).

11549921 is an equidigital number, since it uses as much as digits as its factorization.

11549921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1063.

The product of its digits is 3240, while the sum is 32.

The square root of 11549921 is about 3398.5174708982. The cubic root of 11549921 is about 226.0440107987.

The spelling of 11549921 in words is "eleven million, five hundred forty-nine thousand, nine hundred twenty-one".