111382961 has 4 divisors (see below), whose sum is σ = 111405924. Its totient is φ = 111360000.

The previous prime is 111382949. The next prime is 111382967. The reversal of 111382961 is 169283111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 169283111 = 281 ⋅602431.

It can be written as a sum of positive squares in 2 ways, for example, as 91087936 + 20295025 = 9544^2 + 4505^2 .

It is a cyclic number.

It is not a de Polignac number, because 111382961 - 2²² = 107188657 is a prime.

It is a super-2 number, since 2×111382961² = 24812328002255042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111382967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1040 + ... + 14961.

It is an arithmetic number, because the mean of its divisors is an integer number (27851481).

Almost surely, 2^111382961 is an apocalyptic number.

It is an amenable number.

111382961 is a deficient number, since it is larger than the sum of its proper divisors (22963).

111382961 is an equidigital number, since it uses as much as digits as its factorization.

111382961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22962.

The product of its digits is 2592, while the sum is 32.

The square root of 111382961 is about 10553.8126286191. The cubic root of 111382961 is about 481.1416128315.

The spelling of 111382961 in words is "one hundred eleven million, three hundred eighty-two thousand, nine hundred sixty-one".