402015287 has 2 divisors, whose sum is σ = 402015288. Its totient is φ = 402015286.

The previous prime is 402015247. The next prime is 402015331. The reversal of 402015287 is 782510204.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402015287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (402015227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201007643 + 201007644.

It is an arithmetic number, because the mean of its divisors is an integer number (201007644).

Almost surely, 2^402015287 is an apocalyptic number.

402015287 is a deficient number, since it is larger than the sum of its proper divisors (1).

402015287 is an equidigital number, since it uses as much as digits as its factorization.

402015287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 402015287 is about 20050.3188752698. The cubic root of 402015287 is about 738.0416242316.

The spelling of 402015287 in words is "four hundred two million, fifteen thousand, two hundred eighty-seven".