2051305 has 8 divisors (see below), whose sum is σ = 2606472. Its totient is φ = 1544448.

The previous prime is 2051281. The next prime is 2051311. The reversal of 2051305 is 5031502.

It can be written as a sum of positive squares in 4 ways, for example, as 379456 + 1671849 = 616^2 + 1293^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2051305 - 2¹⁹ = 1527017 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 11982 + ... + 12151.

It is an arithmetic number, because the mean of its divisors is an integer number (325809).

2^2051305 is an apocalyptic number.

It is an amenable number.

2051305 is a deficient number, since it is larger than the sum of its proper divisors (555167).

2051305 is a wasteful number, since it uses less digits than its factorization.

2051305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24155.

The product of its (nonzero) digits is 150, while the sum is 16.

The square root of 2051305 is about 1432.2377595916. The cubic root of 2051305 is about 127.0603594291.

Adding to 2051305 its reverse (5031502), we get a palindrome (7082807).

The spelling of 2051305 in words is "two million, fifty-one thousand, three hundred five".