2521271 has 2 divisors, whose sum is σ = 2521272. Its totient is φ = 2521270.

The previous prime is 2521249. The next prime is 2521273. The reversal of 2521271 is 1721252.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2521271 - 2¹⁰ = 2520247 is a prime.

Together with 2521273, 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 (2521273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260635 + 1260636.

It is an arithmetic number, because the mean of its divisors is an integer number (1260636).

2^2521271 is an apocalyptic number.

2521271 is a deficient number, since it is larger than the sum of its proper divisors (1).

2521271 is an equidigital number, since it uses as much as digits as its factorization.

2521271 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 280, while the sum is 20.

The square root of 2521271 is about 1587.8510635447. The cubic root of 2521271 is about 136.1047167835.

The spelling of 2521271 in words is "two million, five hundred twenty-one thousand, two hundred seventy-one".