111144457 has 2 divisors, whose sum is σ = 111144458. Its totient is φ = 111144456.

The previous prime is 111144413. The next prime is 111144469. The reversal of 111144457 is 754441111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108597241 + 2547216 = 10421^2 + 1596^2 .

It is an emirp because it is prime and its reverse (754441111) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111144457 is a prime.

It is a Chen prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (111144157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55572228 + 55572229.

It is an arithmetic number, because the mean of its divisors is an integer number (55572229).

Almost surely, 2^111144457 is an apocalyptic number.

It is an amenable number.

111144457 is a deficient number, since it is larger than the sum of its proper divisors (1).

111144457 is an equidigital number, since it uses as much as digits as its factorization.

111144457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2240, while the sum is 28.

The square root of 111144457 is about 10542.5071496300. The cubic root of 111144457 is about 480.7979450527.

Adding to 111144457 its reverse (754441111), we get a palindrome (865585568).

The spelling of 111144457 in words is "one hundred eleven million, one hundred forty-four thousand, four hundred fifty-seven".