111461971 has 2 divisors, whose sum is σ = 111461972. Its totient is φ = 111461970.

The previous prime is 111461953. The next prime is 111462031. The reversal of 111461971 is 179164111.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111461971 is a prime.

It is not a weakly prime, because it can be changed into another prime (111461921) 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, 55730985 + 55730986.

It is an arithmetic number, because the mean of its divisors is an integer number (55730986).

Almost surely, 2^111461971 is an apocalyptic number.

111461971 is a deficient number, since it is larger than the sum of its proper divisors (1).

111461971 is an equidigital number, since it uses as much as digits as its factorization.

111461971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1512, while the sum is 31.

The square root of 111461971 is about 10557.5551620629. Note that the first 3 decimals coincide. The cubic root of 111461971 is about 481.2553525913.

The spelling of 111461971 in words is "one hundred eleven million, four hundred sixty-one thousand, nine hundred seventy-one".