42866287 has 2 divisors, whose sum is σ = 42866288. Its totient is φ = 42866286.

The previous prime is 42866251. The next prime is 42866309. The reversal of 42866287 is 78266824.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42866287 is a prime.

It is a super-2 number, since 2×42866287² = 3675037122332738, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42866587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21433143 + 21433144.

It is an arithmetic number, because the mean of its divisors is an integer number (21433144).

Almost surely, 2^42866287 is an apocalyptic number.

42866287 is a deficient number, since it is larger than the sum of its proper divisors (1).

42866287 is an equidigital number, since it uses as much as digits as its factorization.

42866287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 258048, while the sum is 43.

The square root of 42866287 is about 6547.2350652776. The cubic root of 42866287 is about 349.9762895503.

The spelling of 42866287 in words is "forty-two million, eight hundred sixty-six thousand, two hundred eighty-seven".