2051243 has 4 divisors (see below), whose sum is σ = 2106720. Its totient is φ = 1995768.

The previous prime is 2051233. The next prime is 2051249. The reversal of 2051243 is 3421502.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2051243 - 2⁸ = 2050987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2051249) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27683 + ... + 27756.

It is an arithmetic number, because the mean of its divisors is an integer number (526680).

2^2051243 is an apocalyptic number.

2051243 is a deficient number, since it is larger than the sum of its proper divisors (55477).

2051243 is an equidigital number, since it uses as much as digits as its factorization.

2051243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55476.

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 2051243 is about 1432.2161149771. The cubic root of 2051243 is about 127.0590792974.

Adding to 2051243 its reverse (3421502), we get a palindrome (5472745).

The spelling of 2051243 in words is "two million, fifty-one thousand, two hundred forty-three".