111425081 has 2 divisors, whose sum is σ = 111425082. Its totient is φ = 111425080.

The previous prime is 111425071. The next prime is 111425107. The reversal of 111425081 is 180524111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72250000 + 39175081 = 8500^2 + 6259^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111425081 is a prime.

It is a super-2 number, since 2×111425081² = 24831097351713122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111425011) 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 as a sum of consecutive naturals, namely, 55712540 + 55712541.

It is an arithmetic number, because the mean of its divisors is an integer number (55712541).

Almost surely, 2^111425081 is an apocalyptic number.

It is an amenable number.

111425081 is a deficient number, since it is larger than the sum of its proper divisors (1).

111425081 is an equidigital number, since it uses as much as digits as its factorization.

111425081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 320, while the sum is 23.

The square root of 111425081 is about 10555.8079273924. The cubic root of 111425081 is about 481.2022538565.

Adding to 111425081 its reverse (180524111), we get a palindrome (291949192).

The spelling of 111425081 in words is "one hundred eleven million, four hundred twenty-five thousand, eighty-one".