2042781 has 8 divisors (see below), whose sum is σ = 2933280. Its totient is φ = 1257072.

The previous prime is 2042767. The next prime is 2042783. The reversal of 2042781 is 1872402.

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

It is not a de Polignac number, because 2042781 - 2⁵ = 2042749 is a prime.

It is a super-2 number, since 2×2042781² = 8345908427922, which contains 22 as substring.

It is a Curzon number.

2042781 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2042783) 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, 26151 + ... + 26228.

It is an arithmetic number, because the mean of its divisors is an integer number (366660).

2^2042781 is an apocalyptic number.

It is an amenable number.

2042781 is a deficient number, since it is larger than the sum of its proper divisors (890499).

2042781 is a wasteful number, since it uses less digits than its factorization.

2042781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52395.

The product of its (nonzero) digits is 896, while the sum is 24.

The square root of 2042781 is about 1429.2588988703. The cubic root of 2042781 is about 126.8841193992.

The spelling of 2042781 in words is "two million, forty-two thousand, seven hundred eighty-one".