2101265 has 4 divisors (see below), whose sum is σ = 2521524. Its totient is φ = 1681008.

The previous prime is 2101261. The next prime is 2101277. The reversal of 2101265 is 5621012.

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 937024 + 1164241 = 968^2 + 1079^2 .

It is a cyclic number.

It is not a de Polignac number, because 2101265 - 2² = 2101261 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2101261) 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, 210122 + ... + 210131.

It is an arithmetic number, because the mean of its divisors is an integer number (630381).

2^2101265 is an apocalyptic number.

It is an amenable number.

2101265 is a deficient number, since it is larger than the sum of its proper divisors (420259).

2101265 is an equidigital number, since it uses as much as digits as its factorization.

2101265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 420258.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 2101265 is about 1449.5740753752. The cubic root of 2101265 is about 128.0836245540.

Adding to 2101265 its reverse (5621012), we get a palindrome (7722277).

The spelling of 2101265 in words is "two million, one hundred one thousand, two hundred sixty-five".