424987 has 4 divisors (see below), whose sum is σ = 432016. Its totient is φ = 417960.

The previous prime is 424967. The next prime is 424997. The reversal of 424987 is 789424.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-424987 is a prime.

It is a super-2 number, since 2×424987² = 361227900338, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (424967) 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 in 3 ways as a sum of consecutive naturals, for example, 3423 + ... + 3544.

It is an arithmetic number, because the mean of its divisors is an integer number (108004).

2⁴²⁴⁹⁸⁷ is an apocalyptic number.

424987 is a deficient number, since it is larger than the sum of its proper divisors (7029).

424987 is an equidigital number, since it uses as much as digits as its factorization.

424987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7028.

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

The square root of 424987 is about 651.9102698992. The cubic root of 424987 is about 75.1839632130.

The spelling of 424987 in words is "four hundred twenty-four thousand, nine hundred eighty-seven".