2745521 has 2 divisors, whose sum is σ = 2745522. Its totient is φ = 2745520.

The previous prime is 2745503. The next prime is 2745529. The reversal of 2745521 is 1255472.

2745521 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., 2283121 + 462400 = 1511^2 + 680^2 .

It is a cyclic number.

It is not a de Polignac number, because 2745521 - 2¹⁴ = 2729137 is a prime.

It is a super-2 number, since 2×2745521² = 15075771122882, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2745529) 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, 1372760 + 1372761.

It is an arithmetic number, because the mean of its divisors is an integer number (1372761).

2^2745521 is an apocalyptic number.

It is an amenable number.

2745521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2745521 is an equidigital number, since it uses as much as digits as its factorization.

2745521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2800, while the sum is 26.

The square root of 2745521 is about 1656.9613755305. The cubic root of 2745521 is about 140.0258625690.

The spelling of 2745521 in words is "two million, seven hundred forty-five thousand, five hundred twenty-one".