2781459 has 20 divisors (see below), whose sum is σ = 4338576. Its totient is φ = 1772496.

The previous prime is 2781451. The next prime is 2781463. The reversal of 2781459 is 9541872.

It is not a de Polignac number, because 2781459 - 2³ = 2781451 is a prime.

2781459 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2781451) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1117 + ... + 2609.

2^2781459 is an apocalyptic number.

2781459 is a deficient number, since it is larger than the sum of its proper divisors (1557117).

2781459 is a wasteful number, since it uses less digits than its factorization.

2781459 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528 (or 1519 counting only the distinct ones).

The product of its digits is 20160, while the sum is 36.

The square root of 2781459 is about 1667.7706676879. The cubic root of 2781459 is about 140.6341807340.

It can be divided in two parts, 2781 and 459, that added together give a triangular number (3240 = T₈₀).

The spelling of 2781459 in words is "two million, seven hundred eighty-one thousand, four hundred fifty-nine".