111426281 has 2 divisors, whose sum is σ = 111426282. Its totient is φ = 111426280.

The previous prime is 111426253. The next prime is 111426319. The reversal of 111426281 is 182624111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111112681 + 313600 = 10541^2 + 560^2 .

It is a cyclic number.

It is not a de Polignac number, because 111426281 - 2¹⁰ = 111425257 is a prime.

It is a super-2 number, since 2×111426281² = 24831632194981922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 111426281.

It is not a weakly prime, because it can be changed into another prime (111426221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55713140 + 55713141.

It is an arithmetic number, because the mean of its divisors is an integer number (55713141).

Almost surely, 2^111426281 is an apocalyptic number.

It is an amenable number.

111426281 is a deficient number, since it is larger than the sum of its proper divisors (1).

111426281 is an equidigital number, since it uses as much as digits as its factorization.

111426281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 768, while the sum is 26.

The square root of 111426281 is about 10555.8647679856. The cubic root of 111426281 is about 481.2039812971.

The spelling of 111426281 in words is "one hundred eleven million, four hundred twenty-six thousand, two hundred eighty-one".