2781361 has 8 divisors (see below), whose sum is σ = 3139200. Its totient is φ = 2441040.

The previous prime is 2781349. The next prime is 2781377. The reversal of 2781361 is 1631872.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2781361 - 2⁵ = 2781329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2781301) 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, 4041 + ... + 4678.

It is an arithmetic number, because the mean of its divisors is an integer number (392400).

2^2781361 is an apocalyptic number.

It is an amenable number.

2781361 is a deficient number, since it is larger than the sum of its proper divisors (357839).

2781361 is a wasteful number, since it uses less digits than its factorization.

2781361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8759.

The product of its digits is 2016, while the sum is 28.

The square root of 2781361 is about 1667.7412868907. The cubic root of 2781361 is about 140.6325290454.

The spelling of 2781361 in words is "two million, seven hundred eighty-one thousand, three hundred sixty-one".