2051586 has 24 divisors (see below), whose sum is σ = 4471740. Its totient is φ = 679776.

The previous prime is 2051537. The next prime is 2051587. The reversal of 2051586 is 6851502.

It can be written as a sum of positive squares in 2 ways, for example, as 2013561 + 38025 = 1419^2 + 195^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2051587) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5080 + ... + 5468.

2^2051586 is an apocalyptic number.

2051586 is an abundant number, since it is smaller than the sum of its proper divisors (2420154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2051586 is a wasteful number, since it uses less digits than its factorization.

2051586 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690 (or 687 counting only the distinct ones).

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

The square root of 2051586 is about 1432.3358544699. The cubic root of 2051586 is about 127.0661609930.

The spelling of 2051586 in words is "two million, fifty-one thousand, five hundred eighty-six".