4021887 has 8 divisors (see below), whose sum is σ = 5391360. Its totient is φ = 2666840.

The previous prime is 4021879. The next prime is 4021889. The reversal of 4021887 is 7881204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4021887 - 2³ = 4021879 is a prime.

It is a super-3 number, since 3×4021887³ (a number of 21 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4021889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2937 + ... + 4082.

It is an arithmetic number, because the mean of its divisors is an integer number (673920).

Almost surely, 2^4021887 is an apocalyptic number.

4021887 is a deficient number, since it is larger than the sum of its proper divisors (1369473).

4021887 is a wasteful number, since it uses less digits than its factorization.

4021887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7213.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 4021887 is about 2005.4642853963. The cubic root of 4021887 is about 159.0291074435.

The spelling of 4021887 in words is "four million, twenty-one thousand, eight hundred eighty-seven".