4021995 has 8 divisors (see below), whose sum is σ = 6435216. Its totient is φ = 2145056.

The previous prime is 4021973. The next prime is 4022003. The reversal of 4021995 is 5991204.

It is a happy number.

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 4021995 - 2⁷ = 4021867 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 134052 + ... + 134081.

It is an arithmetic number, because the mean of its divisors is an integer number (804402).

Almost surely, 2^4021995 is an apocalyptic number.

4021995 is a deficient number, since it is larger than the sum of its proper divisors (2413221).

4021995 is a wasteful number, since it uses less digits than its factorization.

4021995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268141.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 4021995 is about 2005.4912116487. The cubic root of 4021995 is about 159.0305309039.

It can be divided in two parts, 402199 and 5, that added together give a palindrome (402204).

The spelling of 4021995 in words is "four million, twenty-one thousand, nine hundred ninety-five".