2051659 has 4 divisors (see below), whose sum is σ = 2099416. Its totient is φ = 2003904.

The previous prime is 2051653. The next prime is 2051671. The reversal of 2051659 is 9561502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9561502 = 2 ⋅4780751.

It is a cyclic number.

It is not a de Polignac number, because 2051659 - 2⁵ = 2051627 is a prime.

It is a Duffinian number.

It is a plaindrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (2051653) 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, 23814 + ... + 23899.

It is an arithmetic number, because the mean of its divisors is an integer number (524854).

2^2051659 is an apocalyptic number.

2051659 is a deficient number, since it is larger than the sum of its proper divisors (47757).

2051659 is an equidigital number, since it uses as much as digits as its factorization.

2051659 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47756.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 2051659 is about 1432.3613370934. The cubic root of 2051659 is about 127.0676680741.

The spelling of 2051659 in words is "two million, fifty-one thousand, six hundred fifty-nine".