11534981 has 8 divisors (see below), whose sum is σ = 11864664. Its totient is φ = 11207680.

The previous prime is 11534977. The next prime is 11535001. The reversal of 11534981 is 18943511.

It can be written as a sum of positive squares in 4 ways, for example, as 36100 + 11498881 = 190^2 + 3391^2 .

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 11534981 - 2² = 11534977 is a prime.

It is a super-2 number, since 2×11534981² = 266111573340722, 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 (11534951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14075 + ... + 14871.

It is an arithmetic number, because the mean of its divisors is an integer number (1483083).

Almost surely, 2^11534981 is an apocalyptic number.

It is an amenable number.

11534981 is a deficient number, since it is larger than the sum of its proper divisors (329683).

11534981 is an equidigital number, since it uses as much as digits as its factorization.

11534981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1191.

The product of its digits is 4320, while the sum is 32.

The square root of 11534981 is about 3396.3187424033. The cubic root of 11534981 is about 225.9465049463.

The spelling of 11534981 in words is "eleven million, five hundred thirty-four thousand, nine hundred eighty-one".