42306287 has 2 divisors, whose sum is σ = 42306288. Its totient is φ = 42306286.

The previous prime is 42306247. The next prime is 42306307. The reversal of 42306287 is 78260324.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42306287 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 (42306247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21153143 + 21153144.

It is an arithmetic number, because the mean of its divisors is an integer number (21153144).

Almost surely, 2^42306287 is an apocalyptic number.

42306287 is a deficient number, since it is larger than the sum of its proper divisors (1).

42306287 is an equidigital number, since it uses as much as digits as its factorization.

42306287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 42306287 is about 6504.3283281212. The cubic root of 42306287 is about 348.4455884373.

The spelling of 42306287 in words is "forty-two million, three hundred six thousand, two hundred eighty-seven".