42299287 has 2 divisors, whose sum is σ = 42299288. Its totient is φ = 42299286.

The previous prime is 42299239. The next prime is 42299317. The reversal of 42299287 is 78299224.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42299287 - 2¹¹ = 42297239 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42299237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21149643 + 21149644.

It is an arithmetic number, because the mean of its divisors is an integer number (21149644).

Almost surely, 2^42299287 is an apocalyptic number.

42299287 is a deficient number, since it is larger than the sum of its proper divisors (1).

42299287 is an equidigital number, since it uses as much as digits as its factorization.

42299287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 43.

The square root of 42299287 is about 6503.7902026434. The cubic root of 42299287 is about 348.4263694367.

The spelling of 42299287 in words is "forty-two million, two hundred ninety-nine thousand, two hundred eighty-seven".