2541781 has 8 divisors (see below), whose sum is σ = 2786400. Its totient is φ = 2299440.

The previous prime is 2541769. The next prime is 2541811. The reversal of 2541781 is 1871452.

2541781 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 2541781 - 2¹⁹ = 2017493 is a prime.

It is a super-2 number, since 2×2541781² = 12921301303922, which contains 22 as substring.

It is a Duffinian number.

2541781 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2541701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2530 + ... + 3388.

It is an arithmetic number, because the mean of its divisors is an integer number (348300).

2^2541781 is an apocalyptic number.

It is an amenable number.

2541781 is a deficient number, since it is larger than the sum of its proper divisors (244619).

2541781 is a wasteful number, since it uses less digits than its factorization.

2541781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139.

The product of its digits is 2240, while the sum is 28.

The square root of 2541781 is about 1594.2963965336. The cubic root of 2541781 is about 136.4727814523.

The spelling of 2541781 in words is "two million, five hundred forty-one thousand, seven hundred eighty-one".