2079521 has 4 divisors (see below), whose sum is σ = 2083092. Its totient is φ = 2075952.

The previous prime is 2079487. The next prime is 2079529. The reversal of 2079521 is 1259702.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1079521 + 1000000 = 1039^2 + 1000^2 .

It is a cyclic number.

It is not a de Polignac number, because 2079521 - 2¹⁰ = 2078497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2079529) 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, 686 + ... + 2151.

It is an arithmetic number, because the mean of its divisors is an integer number (520773).

2^2079521 is an apocalyptic number.

It is an amenable number.

2079521 is a deficient number, since it is larger than the sum of its proper divisors (3571).

2079521 is an equidigital number, since it uses as much as digits as its factorization.

2079521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3570.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 2079521 is about 1442.0544372526. The cubic root of 2079521 is about 127.6402864443.

The spelling of 2079521 in words is "two million, seventy-nine thousand, five hundred twenty-one".