2051579 has 4 divisors (see below), whose sum is σ = 2055240. Its totient is φ = 2047920.

The previous prime is 2051537. The next prime is 2051587. The reversal of 2051579 is 9751502.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9751502 = 2 ⋅4875751.

It is a cyclic number.

It is not a de Polignac number, because 2051579 - 2⁸ = 2051323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2051279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 794 + ... + 2175.

It is an arithmetic number, because the mean of its divisors is an integer number (513810).

2^2051579 is an apocalyptic number.

2051579 is a deficient number, since it is larger than the sum of its proper divisors (3661).

2051579 is an equidigital number, since it uses as much as digits as its factorization.

2051579 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3660.

The product of its (nonzero) digits is 3150, while the sum is 29.

The square root of 2051579 is about 1432.3334109068. Note that the first 3 decimals coincide. The cubic root of 2051579 is about 127.0660164765.

The spelling of 2051579 in words is "two million, fifty-one thousand, five hundred seventy-nine".