4021955 has 8 divisors (see below), whose sum is σ = 5515872. Its totient is φ = 2757888.

The previous prime is 4021949. The next prime is 4021961. The reversal of 4021955 is 5591204.

It is an interprime number because it is at equal distance from previous prime (4021949) and next prime (4021961).

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

It is not a de Polignac number, because 4021955 - 2⁶ = 4021891 is a prime.

It is a super-2 number, since 2×4021955² = 32352244044050, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a nialpdrome in base 13.

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, 57422 + ... + 57491.

It is an arithmetic number, because the mean of its divisors is an integer number (689484).

Almost surely, 2^4021955 is an apocalyptic number.

4021955 is a deficient number, since it is larger than the sum of its proper divisors (1493917).

4021955 is a wasteful number, since it uses less digits than its factorization.

4021955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114925.

The product of its (nonzero) digits is 1800, while the sum is 26.

The square root of 4021955 is about 2005.4812390047. The cubic root of 4021955 is about 159.0300036993.

The spelling of 4021955 in words is "four million, twenty-one thousand, nine hundred fifty-five".