442987 has 2 divisors, whose sum is σ = 442988. Its totient is φ = 442986.

The previous prime is 442979. The next prime is 442991. The reversal of 442987 is 789244.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 442987 - 2³ = 442979 is a prime.

It is not a weakly prime, because it can be changed into another prime (442997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221493 + 221494.

It is an arithmetic number, because the mean of its divisors is an integer number (221494).

2⁴⁴²⁹⁸⁷ is an apocalyptic number.

442987 is a deficient number, since it is larger than the sum of its proper divisors (1).

442987 is an equidigital number, since it uses as much as digits as its factorization.

442987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 442987 is about 665.5726857376. The cubic root of 442987 is about 76.2307736171.

The spelling of 442987 in words is "four hundred forty-two thousand, nine hundred eighty-seven".