442521071 has 2 divisors, whose sum is σ = 442521072. Its totient is φ = 442521070.

The previous prime is 442521043. The next prime is 442521089. The reversal of 442521071 is 170125244.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442521071 - 2¹⁴ = 442504687 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 442521071.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (442521091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221260535 + 221260536.

It is an arithmetic number, because the mean of its divisors is an integer number (221260536).

Almost surely, 2^442521071 is an apocalyptic number.

442521071 is a deficient number, since it is larger than the sum of its proper divisors (1).

442521071 is an equidigital number, since it uses as much as digits as its factorization.

442521071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2240, while the sum is 26.

The square root of 442521071 is about 21036.1848014320. The cubic root of 442521071 is about 762.0403800335.

The spelling of 442521071 in words is "four hundred forty-two million, five hundred twenty-one thousand, seventy-one".