2051685 has 24 divisors (see below), whose sum is σ = 3594240. Its totient is φ = 1082592.

The previous prime is 2051671. The next prime is 2051689. The reversal of 2051685 is 5861502.

It is not a de Polignac number, because 2051685 - 2⁵ = 2051653 is a prime.

It is a super-2 number, since 2×2051685² = 8418822678450, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2051689) 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 23 ways as a sum of consecutive naturals, for example, 5536 + ... + 5894.

It is an arithmetic number, because the mean of its divisors is an integer number (149760).

2^2051685 is an apocalyptic number.

It is an amenable number.

2051685 is a deficient number, since it is larger than the sum of its proper divisors (1542555).

2051685 is a wasteful number, since it uses less digits than its factorization.

2051685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497 (or 494 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 2051685 is about 1432.3704129868. The cubic root of 2051685 is about 127.0682048341.

The spelling of 2051685 in words is "two million, fifty-one thousand, six hundred eighty-five".