4555021 has 2 divisors, whose sum is σ = 4555022. Its totient is φ = 4555020.

The previous prime is 4554983. The next prime is 4555027. The reversal of 4555021 is 1205554.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4473225 + 81796 = 2115^2 + 286^2 .

It is a cyclic number.

It is not a de Polignac number, because 4555021 - 2¹⁵ = 4522253 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 4554983 and 4555001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4555027) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2277510 + 2277511.

It is an arithmetic number, because the mean of its divisors is an integer number (2277511).

Almost surely, 2^4555021 is an apocalyptic number.

It is an amenable number.

4555021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4555021 is an equidigital number, since it uses as much as digits as its factorization.

4555021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 4555021 is about 2134.2495168091. The cubic root of 4555021 is about 165.7665101734.

It can be divided in two parts, 455 and 5021, that added together give a square (5476 = 74²).

The spelling of 4555021 in words is "four million, five hundred fifty-five thousand, twenty-one".