42502987 has 2 divisors, whose sum is σ = 42502988. Its totient is φ = 42502986.

The previous prime is 42502969. The next prime is 42503023. The reversal of 42502987 is 78920524.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42502987 is a prime.

It is not a weakly prime, because it can be changed into another prime (42502387) 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, 21251493 + 21251494.

It is an arithmetic number, because the mean of its divisors is an integer number (21251494).

Almost surely, 2^42502987 is an apocalyptic number.

42502987 is a deficient number, since it is larger than the sum of its proper divisors (1).

42502987 is an equidigital number, since it uses as much as digits as its factorization.

42502987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 42502987 is about 6519.4314936197. The cubic root of 42502987 is about 348.9847777862.

The spelling of 42502987 in words is "forty-two million, five hundred two thousand, nine hundred eighty-seven".