42712091 has 2 divisors, whose sum is σ = 42712092. Its totient is φ = 42712090.

The previous prime is 42712073. The next prime is 42712121. The reversal of 42712091 is 19021724.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42712091 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42712091.

It is not a weakly prime, because it can be changed into another prime (42712291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21356045 + 21356046.

It is an arithmetic number, because the mean of its divisors is an integer number (21356046).

Almost surely, 2^42712091 is an apocalyptic number.

42712091 is a deficient number, since it is larger than the sum of its proper divisors (1).

42712091 is an equidigital number, since it uses as much as digits as its factorization.

42712091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 42712091 is about 6535.4487986672. The cubic root of 42712091 is about 349.5561475706.

The spelling of 42712091 in words is "forty-two million, seven hundred twelve thousand, ninety-one".