5555021 has 2 divisors, whose sum is σ = 5555022. Its totient is φ = 5555020.

The previous prime is 5555009. The next prime is 5555023. The reversal of 5555021 is 1205555.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5470921 + 84100 = 2339^2 + 290^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5555021 is a prime.

Together with 5555023, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5555023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2777510 + 2777511.

It is an arithmetic number, because the mean of its divisors is an integer number (2777511).

Almost surely, 2^5555021 is an apocalyptic number.

It is an amenable number.

5555021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5555021 is an equidigital number, since it uses as much as digits as its factorization.

5555021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1250, while the sum is 23.

The square root of 5555021 is about 2356.9092048698. The cubic root of 5555021 is about 177.1040808478.

The spelling of 5555021 in words is "five million, five hundred fifty-five thousand, twenty-one".