11156481 has 16 divisors (see below), whose sum is σ = 18889600. Its totient is φ = 6375024.

The previous prime is 11156461. The next prime is 11156489. The reversal of 11156481 is 18465111.

11156481 is a `hidden beast` number, since 1 + 1 + 15 + 648 + 1 = 666.

It is not a de Polignac number, because 11156481 - 2¹⁰ = 11155457 is a prime.

It is a super-2 number, since 2×11156481² = 248934136606722, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11156489) 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, 29326 + ... + 29703.

It is an arithmetic number, because the mean of its divisors is an integer number (1180600).

Almost surely, 2^11156481 is an apocalyptic number.

It is an amenable number.

11156481 is a deficient number, since it is larger than the sum of its proper divisors (7733119).

11156481 is an equidigital number, since it uses as much as digits as its factorization.

11156481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59045 (or 59039 counting only the distinct ones).

The product of its digits is 960, while the sum is 27.

The square root of 11156481 is about 3340.1318836238. The cubic root of 11156481 is about 223.4476252213.

The spelling of 11156481 in words is "eleven million, one hundred fifty-six thousand, four hundred eighty-one".