42520501 has 2 divisors, whose sum is σ = 42520502. Its totient is φ = 42520500.

The previous prime is 42520487. The next prime is 42520523. The reversal of 42520501 is 10502524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21808900 + 20711601 = 4670^2 + 4551^2 .

It is a cyclic number.

It is not a de Polignac number, because 42520501 - 2¹⁷ = 42389429 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42520601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21260250 + 21260251.

It is an arithmetic number, because the mean of its divisors is an integer number (21260251).

Almost surely, 2^42520501 is an apocalyptic number.

It is an amenable number.

42520501 is a deficient number, since it is larger than the sum of its proper divisors (1).

42520501 is an equidigital number, since it uses as much as digits as its factorization.

42520501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 42520501 is about 6520.7745705552. The cubic root of 42520501 is about 349.0327060260.

The spelling of 42520501 in words is "forty-two million, five hundred twenty thousand, five hundred one".