2261005 has 4 divisors (see below), whose sum is σ = 2713212. Its totient is φ = 1808800.

The previous prime is 2260967. The next prime is 2261009. The reversal of 2261005 is 5001622.

It is a happy number.

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 227529 + 2033476 = 477^2 + 1426^2 .

It is not a de Polignac number, because 2261005 - 2⁹ = 2260493 is a prime.

It is a super-2 number, since 2×2261005² = 10224287220050, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2261005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2261009) 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, 226096 + ... + 226105.

It is an arithmetic number, because the mean of its divisors is an integer number (678303).

2^2261005 is an apocalyptic number.

It is an amenable number.

2261005 is a deficient number, since it is larger than the sum of its proper divisors (452207).

2261005 is an equidigital number, since it uses as much as digits as its factorization.

2261005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452206.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 2261005 is about 1503.6638587131. The cubic root of 2261005 is about 131.2503612991.

Adding to 2261005 its reverse (5001622), we get a palindrome (7262627).

The spelling of 2261005 in words is "two million, two hundred sixty-one thousand, five".