2774521 has 4 divisors (see below), whose sum is σ = 2783092. Its totient is φ = 2765952.

The previous prime is 2774503. The next prime is 2774539. The reversal of 2774521 is 1254772.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (2774503) and next prime (2774539).

It can be written as a sum of positive squares in 2 ways, for example, as 640000 + 2134521 = 800^2 + 1461^2 .

It is a 4-Lehmer number, since φ(2774521) divides (2774521-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 2774521 - 2⁷ = 2774393 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2774521.

It is not an unprimeable number, because it can be changed into a prime (2774501) by changing a digit.

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

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3780 + ... + 4453.

It is an arithmetic number, because the mean of its divisors is an integer number (695773).

2^2774521 is an apocalyptic number.

It is an amenable number.

2774521 is a deficient number, since it is larger than the sum of its proper divisors (8571).

2774521 is an equidigital number, since it uses as much as digits as its factorization.

2774521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8570.

The product of its digits is 3920, while the sum is 28.

The square root of 2774521 is about 1665.6893467871. The cubic root of 2774521 is about 140.5171519441.

The spelling of 2774521 in words is "two million, seven hundred seventy-four thousand, five hundred twenty-one".