2050781 has 4 divisors (see below), whose sum is σ = 2085600. Its totient is φ = 2015964.

The previous prime is 2050777. The next prime is 2050787. The reversal of 2050781 is 1870502.

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 2050781 - 2² = 2050777 is a prime.

It is a super-2 number, since 2×2050781² = 8411405419922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2050787) 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, 17321 + ... + 17438.

It is an arithmetic number, because the mean of its divisors is an integer number (521400).

2^2050781 is an apocalyptic number.

It is an amenable number.

2050781 is a deficient number, since it is larger than the sum of its proper divisors (34819).

2050781 is an equidigital number, since it uses as much as digits as its factorization.

2050781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34818.

The product of its (nonzero) digits is 560, while the sum is 23.

The square root of 2050781 is about 1432.0548173865. The cubic root of 2050781 is about 127.0495394392.

The spelling of 2050781 in words is "two million, fifty thousand, seven hundred eighty-one".