2678761 has 4 divisors (see below), whose sum is σ = 2698452. Its totient is φ = 2659072.

The previous prime is 2678749. The next prime is 2678789. The reversal of 2678761 is 1678762.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1678762 = 2 ⋅839381.

It can be written as a sum of positive squares in 2 ways, for example, as 1946025 + 732736 = 1395^2 + 856^2 .

It is a cyclic number.

It is not a de Polignac number, because 2678761 - 2⁵ = 2678729 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 2678761.

It is not an unprimeable number, because it can be changed into a prime (2670761) 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, 9640 + ... + 9913.

It is an arithmetic number, because the mean of its divisors is an integer number (674613).

2^2678761 is an apocalyptic number.

It is an amenable number.

2678761 is a deficient number, since it is larger than the sum of its proper divisors (19691).

2678761 is a wasteful number, since it uses less digits than its factorization.

2678761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19690.

The product of its digits is 28224, while the sum is 37.

The square root of 2678761 is about 1636.6920907733. The cubic root of 2678761 is about 138.8815822882.

Subtracting from 2678761 its reverse (1678762), we obtain a palindrome (999999).

It can be divided in two parts, 26 and 78761, that added together give a palindrome (78787).

The spelling of 2678761 in words is "two million, six hundred seventy-eight thousand, seven hundred sixty-one".