2874781 has 12 divisors (see below), whose sum is σ = 3602172. Its totient is φ = 2274048.

The previous prime is 2874749. The next prime is 2874791. The reversal of 2874781 is 1874782.

It can be written as a sum of positive squares in 2 ways, for example, as 122500 + 2752281 = 350^2 + 1659^2 .

It is not a de Polignac number, because 2874781 - 2⁵ = 2874749 is a prime.

It is a super-2 number, since 2×2874781² = 16528731595922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2874781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2874721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1620 + ... + 2893.

It is an arithmetic number, because the mean of its divisors is an integer number (300181).

2^2874781 is an apocalyptic number.

It is an amenable number.

2874781 is a deficient number, since it is larger than the sum of its proper divisors (727391).

2874781 is a wasteful number, since it uses less digits than its factorization.

2874781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4540 (or 4533 counting only the distinct ones).

The product of its digits is 25088, while the sum is 37.

The square root of 2874781 is about 1695.5179149747. The cubic root of 2874781 is about 142.1897384263.

Subtracting from 2874781 its reverse (1874782), we obtain a palindrome (999999).

It can be divided in two parts, 2874 and 781, that added together give a triangular number (3655 = T₈₅).

The spelling of 2874781 in words is "two million, eight hundred seventy-four thousand, seven hundred eighty-one".