2781367 has 4 divisors (see below), whose sum is σ = 2902320. Its totient is φ = 2660416.

The previous prime is 2781349. The next prime is 2781377. The reversal of 2781367 is 7631872.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2781367 is a prime.

It is a Duffinian number.

2781367 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781307) 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, 60442 + ... + 60487.

It is an arithmetic number, because the mean of its divisors is an integer number (725580).

2^2781367 is an apocalyptic number.

2781367 is a deficient number, since it is larger than the sum of its proper divisors (120953).

2781367 is a wasteful number, since it uses less digits than its factorization.

2781367 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120952.

The product of its digits is 14112, while the sum is 34.

The square root of 2781367 is about 1667.7430857299. The cubic root of 2781367 is about 140.6326301703.

The spelling of 2781367 in words is "two million, seven hundred eighty-one thousand, three hundred sixty-seven".