4055021 has 2 divisors, whose sum is σ = 4055022. Its totient is φ = 4055020.

The previous prime is 4054997. The next prime is 4055033. The reversal of 4055021 is 1205504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2464900 + 1590121 = 1570^2 + 1261^2 .

It is a cyclic number.

It is not a de Polignac number, because 4055021 - 2⁶ = 4054957 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4055071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2027510 + 2027511.

It is an arithmetic number, because the mean of its divisors is an integer number (2027511).

Almost surely, 2^4055021 is an apocalyptic number.

It is an amenable number.

4055021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4055021 is an equidigital number, since it uses as much as digits as its factorization.

4055021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 4055021 is about 2013.7082708277. The cubic root of 4055021 is about 159.4646298866.

The spelling of 4055021 in words is "four million, fifty-five thousand, twenty-one".