4082421 has 16 divisors (see below), whose sum is σ = 6422528. Its totient is φ = 2257200.

The previous prime is 4082413. The next prime is 4082423. The reversal of 4082421 is 1242804.

It is not a de Polignac number, because 4082421 - 2³ = 4082413 is a prime.

It is a super-2 number, since 2×4082421² = 33332322442482, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is the 2021-st Hogben number.

4082421 is a lucky number.

It is a zygodrome in base 6.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4082423) by changing a digit.

It is a nontrivial repunit in base 2020.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2485 + ... + 3786.

It is an arithmetic number, because the mean of its divisors is an integer number (401408).

Almost surely, 2^4082421 is an apocalyptic number.

It is an amenable number.

4082421 is a deficient number, since it is larger than the sum of its proper divisors (2340107).

4082421 is a wasteful number, since it uses less digits than its factorization.

4082421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6312.

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 4082421 is about 2020.5001855976. The cubic root of 4082421 is about 159.8229943576.

The spelling of 4082421 in words is "four million, eighty-two thousand, four hundred twenty-one".