42288971 has 2 divisors, whose sum is σ = 42288972. Its totient is φ = 42288970.

The previous prime is 42288959. The next prime is 42288977. The reversal of 42288971 is 17988224.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42288971 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (42288977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21144485 + 21144486.

It is an arithmetic number, because the mean of its divisors is an integer number (21144486).

Almost surely, 2^42288971 is an apocalyptic number.

42288971 is a deficient number, since it is larger than the sum of its proper divisors (1).

42288971 is an equidigital number, since it uses as much as digits as its factorization.

42288971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 41.

The square root of 42288971 is about 6502.9970782709. The cubic root of 42288971 is about 348.3980422558.

The spelling of 42288971 in words is "forty-two million, two hundred eighty-eight thousand, nine hundred seventy-one".