11554981 has 8 divisors (see below), whose sum is σ = 11737440. Its totient is φ = 11374128.

The previous prime is 11554969. The next prime is 11554999. The reversal of 11554981 is 18945511.

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 11554981 - 2⁷ = 11554853 is a prime.

It is a super-2 number, since 2×11554981² = 267035171820722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11554381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24510 + ... + 24976.

It is an arithmetic number, because the mean of its divisors is an integer number (1467180).

Almost surely, 2^11554981 is an apocalyptic number.

It is an amenable number.

11554981 is a deficient number, since it is larger than the sum of its proper divisors (182459).

11554981 is a wasteful number, since it uses less digits than its factorization.

11554981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 803.

The product of its digits is 7200, while the sum is 34.

The square root of 11554981 is about 3399.2618316335. The cubic root of 11554981 is about 226.0770158067.

The spelling of 11554981 in words is "eleven million, five hundred fifty-four thousand, nine hundred eighty-one".