4021667 has 4 divisors (see below), whose sum is σ = 4331040. Its totient is φ = 3712296.

The previous prime is 4021663. The next prime is 4021727. The reversal of 4021667 is 7661204.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4021667 - 2² = 4021663 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4021663) 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, 154667 + ... + 154692.

It is an arithmetic number, because the mean of its divisors is an integer number (1082760).

Almost surely, 2^4021667 is an apocalyptic number.

4021667 is a deficient number, since it is larger than the sum of its proper divisors (309373).

4021667 is a wasteful number, since it uses less digits than its factorization.

4021667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309372.

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 4021667 is about 2005.4094345046. The cubic root of 4021667 is about 159.0262077233.

The spelling of 4021667 in words is "four million, twenty-one thousand, six hundred sixty-seven".