42299237 has 2 divisors, whose sum is σ = 42299238. Its totient is φ = 42299236.

The previous prime is 42299219. The next prime is 42299239. The reversal of 42299237 is 73299224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28206721 + 14092516 = 5311^2 + 3754^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42299237 is a prime.

Together with 42299239, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42299237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42299239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21149618 + 21149619.

It is an arithmetic number, because the mean of its divisors is an integer number (21149619).

Almost surely, 2^42299237 is an apocalyptic number.

It is an amenable number.

42299237 is a deficient number, since it is larger than the sum of its proper divisors (1).

42299237 is an equidigital number, since it uses as much as digits as its factorization.

42299237 is an evil number, because the sum of its binary digits is even.

The product of its digits is 54432, while the sum is 38.

The square root of 42299237 is about 6503.7863587298. The cubic root of 42299237 is about 348.4262321505.

The spelling of 42299237 in words is "forty-two million, two hundred ninety-nine thousand, two hundred thirty-seven".