2772521 has 4 divisors (see below), whose sum is σ = 2847492. Its totient is φ = 2697552.

The previous prime is 2772481. The next prime is 2772529. The reversal of 2772521 is 1252772.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1860496 + 912025 = 1364^2 + 955^2 .

It is a cyclic number.

It is not a de Polignac number, because 2772521 - 2⁶ = 2772457 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2772529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37430 + ... + 37503.

It is an arithmetic number, because the mean of its divisors is an integer number (711873).

2^2772521 is an apocalyptic number.

It is an amenable number.

2772521 is a deficient number, since it is larger than the sum of its proper divisors (74971).

2772521 is an equidigital number, since it uses as much as digits as its factorization.

2772521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74970.

The product of its digits is 1960, while the sum is 26.

The square root of 2772521 is about 1665.0888865163. The cubic root of 2772521 is about 140.4833801257.

The spelling of 2772521 in words is "two million, seven hundred seventy-two thousand, five hundred twenty-one".