4021487 has 4 divisors (see below), whose sum is σ = 4025976. Its totient is φ = 4017000.

The previous prime is 4021477. The next prime is 4021513. The reversal of 4021487 is 7841204.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4021487 - 2⁴ = 4021471 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 389 + ... + 2862.

It is an arithmetic number, because the mean of its divisors is an integer number (1006494).

Almost surely, 2^4021487 is an apocalyptic number.

4021487 is a deficient number, since it is larger than the sum of its proper divisors (4489).

4021487 is a wasteful number, since it uses less digits than its factorization.

4021487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4488.

The product of its (nonzero) digits is 1792, while the sum is 26.

The square root of 4021487 is about 2005.3645553864. The cubic root of 4021487 is about 159.0238351462.

The spelling of 4021487 in words is "four million, twenty-one thousand, four hundred eighty-seven".