5381521 has 2 divisors, whose sum is σ = 5381522. Its totient is φ = 5381520.

The previous prime is 5381491. The next prime is 5381543. The reversal of 5381521 is 1251835.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4562496 + 819025 = 2136^2 + 905^2 .

It is a cyclic number.

It is not a de Polignac number, because 5381521 - 2¹⁷ = 5250449 is a prime.

It is equal to p₃₇₃₁₆₅ and since 5381521 and 373165 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (5381561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2690760 + 2690761.

It is an arithmetic number, because the mean of its divisors is an integer number (2690761).

Almost surely, 2^5381521 is an apocalyptic number.

It is an amenable number.

5381521 is a deficient number, since it is larger than the sum of its proper divisors (1).

5381521 is an equidigital number, since it uses as much as digits as its factorization.

5381521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1200, while the sum is 25.

The square root of 5381521 is about 2319.8105526098. The cubic root of 5381521 is about 175.2407136430.

The spelling of 5381521 in words is "five million, three hundred eighty-one thousand, five hundred twenty-one".