111123457 has 16 divisors (see below), whose sum is σ = 120087360. Its totient is φ = 102503232.

The previous prime is 111123443. The next prime is 111123479. The reversal of 111123457 is 754321111.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111123457 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 (111123497) 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 15 ways as a sum of consecutive naturals, for example, 163803 + ... + 164479.

It is an arithmetic number, because the mean of its divisors is an integer number (7505460).

Almost surely, 2^111123457 is an apocalyptic number.

It is an amenable number.

111123457 is a deficient number, since it is larger than the sum of its proper divisors (8963903).

111123457 is a wasteful number, since it uses less digits than its factorization.

111123457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 912.

The product of its digits is 840, while the sum is 25.

The square root of 111123457 is about 10541.5111345575. The cubic root of 111123457 is about 480.7676619626.

Adding to 111123457 its reverse (754321111), we get a palindrome (865444568).

The spelling of 111123457 in words is "one hundred eleven million, one hundred twenty-three thousand, four hundred fifty-seven".