2715521 has 2 divisors, whose sum is σ = 2715522. Its totient is φ = 2715520.

The previous prime is 2715497. The next prime is 2715523. The reversal of 2715521 is 1255172.

It is a happy number.

2715521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2689600 + 25921 = 1640^2 + 161^2 .

It is a cyclic number.

It is not a de Polignac number, because 2715521 - 2⁶ = 2715457 is a prime.

It is a Sophie Germain prime.

Together with 2715523, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2715523) 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, 1357760 + 1357761.

It is an arithmetic number, because the mean of its divisors is an integer number (1357761).

2^2715521 is an apocalyptic number.

It is an amenable number.

2715521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2715521 is an equidigital number, since it uses as much as digits as its factorization.

2715521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 700, while the sum is 23.

The square root of 2715521 is about 1647.8837944467. The cubic root of 2715521 is about 139.5139779504.

The spelling of 2715521 in words is "two million, seven hundred fifteen thousand, five hundred twenty-one".