2075721 has 4 divisors (see below), whose sum is σ = 2767632. Its totient is φ = 1383812.

The previous prime is 2075713. The next prime is 2075741. The reversal of 2075721 is 1275702.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2075721 - 2³ = 2075713 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 2075691 and 2075700.

It is not an unprimeable number, because it can be changed into a prime (2075741) 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, 345951 + ... + 345956.

It is an arithmetic number, because the mean of its divisors is an integer number (691908).

2^2075721 is an apocalyptic number.

It is an amenable number.

2075721 is a deficient number, since it is larger than the sum of its proper divisors (691911).

2075721 is an equidigital number, since it uses as much as digits as its factorization.

2075721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691910.

The product of its (nonzero) digits is 980, while the sum is 24.

The square root of 2075721 is about 1440.7362701064. The cubic root of 2075721 is about 127.5624914730.

The spelling of 2075721 in words is "two million, seventy-five thousand, seven hundred twenty-one".