5891521 has 2 divisors, whose sum is σ = 5891522. Its totient is φ = 5891520.

The previous prime is 5891507. The next prime is 5891531. The reversal of 5891521 is 1251985.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4601025 + 1290496 = 2145^2 + 1136^2 .

It is a cyclic number.

It is not a de Polignac number, because 5891521 - 2⁷ = 5891393 is a prime.

It is not a weakly prime, because it can be changed into another prime (5891531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2945760 + 2945761.

It is an arithmetic number, because the mean of its divisors is an integer number (2945761).

Almost surely, 2^5891521 is an apocalyptic number.

It is an amenable number.

5891521 is a deficient number, since it is larger than the sum of its proper divisors (1).

5891521 is an equidigital number, since it uses as much as digits as its factorization.

5891521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 31.

The square root of 5891521 is about 2427.2455582409. The cubic root of 5891521 is about 180.6102844778.

The spelling of 5891521 in words is "five million, eight hundred ninety-one thousand, five hundred twenty-one".