2781241 has 4 divisors (see below), whose sum is σ = 2787712. Its totient is φ = 2774772.

The previous prime is 2781221. The next prime is 2781271. The reversal of 2781241 is 1421872.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2781241 - 2⁵ = 2781209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2781211) 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, 2541 + ... + 3466.

It is an arithmetic number, because the mean of its divisors is an integer number (696928).

2^2781241 is an apocalyptic number.

It is an amenable number.

2781241 is a deficient number, since it is larger than the sum of its proper divisors (6471).

2781241 is an equidigital number, since it uses as much as digits as its factorization.

2781241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6470.

The product of its digits is 896, while the sum is 25.

The square root of 2781241 is about 1667.7053096995. The cubic root of 2781241 is about 140.6305065169.

The spelling of 2781241 in words is "two million, seven hundred eighty-one thousand, two hundred forty-one".