4021895 has 16 divisors (see below), whose sum is σ = 5164992. Its totient is φ = 2999040.

The previous prime is 4021891. The next prime is 4021903. The reversal of 4021895 is 5981204.

It is not a de Polignac number, because 4021895 - 2² = 4021891 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 (4021891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4289 + ... + 5141.

It is an arithmetic number, because the mean of its divisors is an integer number (322812).

Almost surely, 2^4021895 is an apocalyptic number.

4021895 is a deficient number, since it is larger than the sum of its proper divisors (1143097).

4021895 is a wasteful number, since it uses less digits than its factorization.

4021895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 922.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 4021895 is about 2005.4662799459. The cubic root of 4021895 is about 159.0292128859.

The spelling of 4021895 in words is "four million, twenty-one thousand, eight hundred ninety-five".