425987 has 2 divisors, whose sum is σ = 425988. Its totient is φ = 425986.

The previous prime is 425977. The next prime is 425989. The reversal of 425987 is 789524.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 425987 - 2¹² = 421891 is a prime.

Together with 425989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (425989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212993 + 212994.

It is an arithmetic number, because the mean of its divisors is an integer number (212994).

2⁴²⁵⁹⁸⁷ is an apocalyptic number.

425987 is a deficient number, since it is larger than the sum of its proper divisors (1).

425987 is an equidigital number, since it uses as much as digits as its factorization.

425987 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 35.

The square root of 425987 is about 652.6767959718. The cubic root of 425987 is about 75.2428866394.

The spelling of 425987 in words is "four hundred twenty-five thousand, nine hundred eighty-seven".