5891021 has 2 divisors, whose sum is σ = 5891022. Its totient is φ = 5891020.

The previous prime is 5891009. The next prime is 5891047. The reversal of 5891021 is 1201985.

It is a happy number.

5891021 is nontrivially palindromic in base 2.

It is an a-pointer prime, because the next prime (5891047) can be obtained adding 5891021 to its sum of digits (26).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5692996 + 198025 = 2386^2 + 445^2 .

It is a cyclic number.

It is not a de Polignac number, because 5891021 - 2¹⁸ = 5628877 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5891051) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2945510 + 2945511.

It is an arithmetic number, because the mean of its divisors is an integer number (2945511).

Almost surely, 2^5891021 is an apocalyptic number.

It is an amenable number.

5891021 is a deficient number, since it is larger than the sum of its proper divisors (1).

5891021 is an equidigital number, since it uses as much as digits as its factorization.

5891021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 26.

The square root of 5891021 is about 2427.1425586479. The cubic root of 5891021 is about 180.6051750051.

The spelling of 5891021 in words is "five million, eight hundred ninety-one thousand, twenty-one".