5421987 has 12 divisors (see below), whose sum is σ = 7905040. Its totient is φ = 3580848.

The previous prime is 5421947. The next prime is 5422003. The reversal of 5421987 is 7891245.

It is not a de Polignac number, because 5421987 - 2¹⁰ = 5420963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5421907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1783 + ... + 3744.

Almost surely, 2^5421987 is an apocalyptic number.

5421987 is a deficient number, since it is larger than the sum of its proper divisors (2483053).

5421987 is a wasteful number, since it uses less digits than its factorization.

5421987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5642 (or 5639 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 5421987 is about 2328.5160510505. The cubic root of 5421987 is about 175.6788543614.

The spelling of 5421987 in words is "five million, four hundred twenty-one thousand, nine hundred eighty-seven".