42605237 has 2 divisors, whose sum is σ = 42605238. Its totient is φ = 42605236.

The previous prime is 42605141. The next prime is 42605243. The reversal of 42605237 is 73250624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42523441 + 81796 = 6521^2 + 286^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42605237 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 (42605287) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21302618 + 21302619.

It is an arithmetic number, because the mean of its divisors is an integer number (21302619).

Almost surely, 2^42605237 is an apocalyptic number.

It is an amenable number.

42605237 is a deficient number, since it is larger than the sum of its proper divisors (1).

42605237 is an equidigital number, since it uses as much as digits as its factorization.

42605237 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 29.

The square root of 42605237 is about 6527.2687243594. The cubic root of 42605237 is about 349.2644061081.

The spelling of 42605237 in words is "forty-two million, six hundred five thousand, two hundred thirty-seven".