42520771 has 2 divisors, whose sum is σ = 42520772. Its totient is φ = 42520770.

The previous prime is 42520741. The next prime is 42520783. The reversal of 42520771 is 17702524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42520771 - 2⁵ = 42520739 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42520711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21260385 + 21260386.

It is an arithmetic number, because the mean of its divisors is an integer number (21260386).

Almost surely, 2^42520771 is an apocalyptic number.

42520771 is a deficient number, since it is larger than the sum of its proper divisors (1).

42520771 is an equidigital number, since it uses as much as digits as its factorization.

42520771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3920, while the sum is 28.

The square root of 42520771 is about 6520.7952735844. The cubic root of 42520771 is about 349.0334447961.

The spelling of 42520771 in words is "forty-two million, five hundred twenty thousand, seven hundred seventy-one".