2051505 has 12 divisors (see below), whose sum is σ = 3556020. Its totient is φ = 1094112.

The previous prime is 2051479. The next prime is 2051507. The reversal of 2051505 is 5051502.

It can be written as a sum of positive squares in 2 ways, for example, as 589824 + 1461681 = 768^2 + 1209^2 .

It is not a de Polignac number, because 2051505 - 2⁸ = 2051249 is a prime.

2051505 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2051507) 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 11 ways as a sum of consecutive naturals, for example, 22750 + ... + 22839.

It is an arithmetic number, because the mean of its divisors is an integer number (296335).

2^2051505 is an apocalyptic number.

It is an amenable number.

2051505 is a deficient number, since it is larger than the sum of its proper divisors (1504515).

2051505 is a wasteful number, since it uses less digits than its factorization.

2051505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45600 (or 45597 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 18.

The square root of 2051505 is about 1432.3075786995. The cubic root of 2051505 is about 127.0644887104.

It can be divided in two parts, 2051 and 505, that added together give a triangular number (2556 = T₇₁).

The spelling of 2051505 in words is "two million, fifty-one thousand, five hundred five".