111442057 has 2 divisors, whose sum is σ = 111442058. Its totient is φ = 111442056.

The previous prime is 111442031. The next prime is 111442081. The reversal of 111442057 is 750244111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 91470096 + 19971961 = 9564^2 + 4469^2 .

It is an emirp because it is prime and its reverse (750244111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111442057 - 2¹⁵ = 111409289 is a prime.

It is not a weakly prime, because it can be changed into another prime (111442007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55721028 + 55721029.

It is an arithmetic number, because the mean of its divisors is an integer number (55721029).

Almost surely, 2^111442057 is an apocalyptic number.

It is an amenable number.

111442057 is a deficient number, since it is larger than the sum of its proper divisors (1).

111442057 is an equidigital number, since it uses as much as digits as its factorization.

111442057 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1120, while the sum is 25.

The square root of 111442057 is about 10556.6120038581. The cubic root of 111442057 is about 481.2266902298.

Adding to 111442057 its reverse (750244111), we get a palindrome (861686168).

The spelling of 111442057 in words is "one hundred eleven million, four hundred forty-two thousand, fifty-seven".