111457 has 4 divisors (see below), whose sum is σ = 112176. Its totient is φ = 110740.

The previous prime is 111443. The next prime is 111467. The reversal of 111457 is 754111.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111457 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (111427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19 + ... + 472.

It is an arithmetic number, because the mean of its divisors is an integer number (28044).

2¹¹¹⁴⁵⁷ is an apocalyptic number.

It is an amenable number.

111457 is a deficient number, since it is larger than the sum of its proper divisors (719).

111457 is an equidigital number, since it uses as much as digits as its factorization.

111457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 718.

The product of its digits is 140, while the sum is 19.

The square root of 111457 is about 333.8517635119. The cubic root of 111457 is about 48.1248198115.

Adding to 111457 its reverse (754111), we get a palindrome (865568).

The spelling of 111457 in words is "one hundred eleven thousand, four hundred fifty-seven".