111456321 has 32 divisors (see below), whose sum is σ = 160876800. Its totient is φ = 68454144.

The previous prime is 111456313. The next prime is 111456329. The reversal of 111456321 is 123654111.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (111456313) and next prime (111456329).

It is not a de Polignac number, because 111456321 - 2³ = 111456313 is a prime.

It is a super-2 number, since 2×111456321² = 24845022981710082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111456291 and 111456300.

It is not an unprimeable number, because it can be changed into a prime (111456329) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 380251 + ... + 380543.

It is an arithmetic number, because the mean of its divisors is an integer number (5027400).

Almost surely, 2^111456321 is an apocalyptic number.

It is an amenable number.

111456321 is a deficient number, since it is larger than the sum of its proper divisors (49420479).

111456321 is a wasteful number, since it uses less digits than its factorization.

111456321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 505.

The product of its digits is 720, while the sum is 24.

The square root of 111456321 is about 10557.2875777825. The cubic root of 111456321 is about 481.2472208531.

The spelling of 111456321 in words is "one hundred eleven million, four hundred fifty-six thousand, three hundred twenty-one".