111444457 has 4 divisors (see below), whose sum is σ = 111466836. Its totient is φ = 111422080.

The previous prime is 111444449. The next prime is 111444479. The reversal of 111444457 is 754444111.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 754444111 = 397 ⋅1900363.

It can be written as a sum of positive squares in 2 ways, for example, as 100580841 + 10863616 = 10029^2 + 3296^2 .

It is a cyclic number.

It is not a de Polignac number, because 111444457 - 2³ = 111444449 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 (111444497) 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, 33 + ... + 14929.

It is an arithmetic number, because the mean of its divisors is an integer number (27866709).

Almost surely, 2^111444457 is an apocalyptic number.

It is an amenable number.

111444457 is a deficient number, since it is larger than the sum of its proper divisors (22379).

111444457 is an equidigital number, since it uses as much as digits as its factorization.

111444457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22378.

The product of its digits is 8960, while the sum is 31.

The square root of 111444457 is about 10556.7256760797. The cubic root of 111444457 is about 481.2301447478.

Adding to 111444457 its reverse (754444111), we get a palindrome (865888568).

The spelling of 111444457 in words is "one hundred eleven million, four hundred forty-four thousand, four hundred fifty-seven".