11544981 has 16 divisors (see below), whose sum is σ = 17817600. Its totient is φ = 6512688.

The previous prime is 11544977. The next prime is 11545003. The reversal of 11544981 is 18944511.

It is not a de Polignac number, because 11544981 - 2² = 11544977 is a prime.

It is a super-2 number, since 2×11544981² = 266573172580722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11544901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1821 + ... + 5138.

It is an arithmetic number, because the mean of its divisors is an integer number (1113600).

Almost surely, 2^11544981 is an apocalyptic number.

It is an amenable number.

11544981 is a deficient number, since it is larger than the sum of its proper divisors (6272619).

11544981 is an equidigital number, since it uses as much as digits as its factorization.

11544981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7048.

The product of its digits is 5760, while the sum is 33.

The square root of 11544981 is about 3397.7906056730. The cubic root of 11544981 is about 226.0117792174.

The spelling of 11544981 in words is "eleven million, five hundred forty-four thousand, nine hundred eighty-one".