6442587 has 6 divisors (see below), whose sum is σ = 9305972. Its totient is φ = 4295052.

The previous prime is 6442573. The next prime is 6442591. The reversal of 6442587 is 7852446.

6442587 is a `hidden beast` number, since 644 + 2 + 5 + 8 + 7 = 666.

It is not a de Polignac number, because 6442587 - 2⁴ = 6442571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6442567) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 357913 + ... + 357930.

Almost surely, 2^6442587 is an apocalyptic number.

6442587 is a deficient number, since it is larger than the sum of its proper divisors (2863385).

6442587 is a wasteful number, since it uses less digits than its factorization.

6442587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 715849 (or 715846 counting only the distinct ones).

The product of its digits is 53760, while the sum is 36.

The square root of 6442587 is about 2538.2251673167. The cubic root of 6442587 is about 186.0744585693.

The spelling of 6442587 in words is "six million, four hundred forty-two thousand, five hundred eighty-seven".