42520487 has 2 divisors, whose sum is σ = 42520488. Its totient is φ = 42520486.

The previous prime is 42520447. The next prime is 42520501. The reversal of 42520487 is 78402524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42520487 - 2¹⁴ = 42504103 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42520447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21260243 + 21260244.

It is an arithmetic number, because the mean of its divisors is an integer number (21260244).

Almost surely, 2^42520487 is an apocalyptic number.

42520487 is a deficient number, since it is larger than the sum of its proper divisors (1).

42520487 is an equidigital number, since it uses as much as digits as its factorization.

42520487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17920, while the sum is 32.

The square root of 42520487 is about 6520.7734970631. The cubic root of 42520487 is about 349.0326677193.

The spelling of 42520487 in words is "forty-two million, five hundred twenty thousand, four hundred eighty-seven".