2071565 has 4 divisors (see below), whose sum is σ = 2485884. Its totient is φ = 1657248.

The previous prime is 2071561. The next prime is 2071579. The reversal of 2071565 is 5651702.

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 662596 + 1408969 = 814^2 + 1187^2 .

It is a cyclic number.

It is not a de Polignac number, because 2071565 - 2² = 2071561 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2071561) 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, 207152 + ... + 207161.

It is an arithmetic number, because the mean of its divisors is an integer number (621471).

2^2071565 is an apocalyptic number.

It is an amenable number.

2071565 is a deficient number, since it is larger than the sum of its proper divisors (414319).

2071565 is an equidigital number, since it uses as much as digits as its factorization.

2071565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414318.

The product of its (nonzero) digits is 2100, while the sum is 26.

The square root of 2071565 is about 1439.2932293317. The cubic root of 2071565 is about 127.4772995598.

The spelling of 2071565 in words is "two million, seventy-one thousand, five hundred sixty-five".