2781572 has 24 divisors (see below), whose sum is σ = 5037984. Its totient is φ = 1343232.

The previous prime is 2781521. The next prime is 2781577. The reversal of 2781572 is 2751872.

It is not an unprimeable number, because it can be changed into a prime (2781577) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25943 + ... + 26049.

It is an arithmetic number, because the mean of its divisors is an integer number (209916).

2^2781572 is an apocalyptic number.

It is an amenable number.

2781572 is a deficient number, since it is larger than the sum of its proper divisors (2256412).

2781572 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (2781571) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (273).

2781572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 275 (or 273 counting only the distinct ones).

The product of its digits is 7840, while the sum is 32.

The square root of 2781572 is about 1667.8045449033. The cubic root of 2781572 is about 140.6360851838.

The spelling of 2781572 in words is "two million, seven hundred eighty-one thousand, five hundred seventy-two".