42099287 has 2 divisors, whose sum is σ = 42099288. Its totient is φ = 42099286.

The previous prime is 42099227. The next prime is 42099289. The reversal of 42099287 is 78299024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42099287 - 2¹⁶ = 42033751 is a prime.

Together with 42099289, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42099289) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21049643 + 21049644.

It is an arithmetic number, because the mean of its divisors is an integer number (21049644).

Almost surely, 2^42099287 is an apocalyptic number.

42099287 is a deficient number, since it is larger than the sum of its proper divisors (1).

42099287 is an equidigital number, since it uses as much as digits as its factorization.

42099287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 42099287 is about 6488.3963349968. The cubic root of 42099287 is about 347.8763570751.

The spelling of 42099287 in words is "forty-two million, ninety-nine thousand, two hundred eighty-seven".