4020867 has 8 divisors (see below), whose sum is σ = 5956880. Its totient is φ = 2680560.

The previous prime is 4020847. The next prime is 4020869. The reversal of 4020867 is 7680204.

It is not a de Polignac number, because 4020867 - 2¹⁰ = 4019843 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 148921 = 4020867 / (4 + 0 + 2 + 0 + 8 + 6 + 7).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4020867.

It is not an unprimeable number, because it can be changed into a prime (4020869) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74434 + ... + 74487.

It is an arithmetic number, because the mean of its divisors is an integer number (744610).

Almost surely, 2^4020867 is an apocalyptic number.

4020867 is a deficient number, since it is larger than the sum of its proper divisors (1936013).

4020867 is a wasteful number, since it uses less digits than its factorization.

4020867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148930 (or 148924 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 4020867 is about 2005.2099640686. The cubic root of 4020867 is about 159.0156623945.

The spelling of 4020867 in words is "four million, twenty thousand, eight hundred sixty-seven".