4092021 has 12 divisors (see below), whose sum is σ = 5955040. Its totient is φ = 2707560.

The previous prime is 4092013. The next prime is 4092029. The reversal of 4092021 is 1202904.

It is an interprime number because it is at equal distance from previous prime (4092013) and next prime (4092029).

It is not a de Polignac number, because 4092021 - 2³ = 4092013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4091985 and 4092003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4092029) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 385 + ... + 2886.

Almost surely, 2^4092021 is an apocalyptic number.

It is an amenable number.

4092021 is a deficient number, since it is larger than the sum of its proper divisors (1863019).

4092021 is a wasteful number, since it uses less digits than its factorization.

4092021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3416 (or 3413 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 4092021 is about 2022.8744399987. The cubic root of 4092021 is about 159.9481733184.

Adding to 4092021 its reverse (1202904), we get a palindrome (5294925).

The spelling of 4092021 in words is "four million, ninety-two thousand, twenty-one".