2261161 has 8 divisors (see below), whose sum is σ = 2594880. Its totient is φ = 1930128.

The previous prime is 2261143. The next prime is 2261173. The reversal of 2261161 is 1611622.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2261161 - 2⁹ = 2260649 is a prime.

It is a super-2 number, since 2×2261161² = 10225698135842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2261111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1710 + ... + 2728.

It is an arithmetic number, because the mean of its divisors is an integer number (324360).

2^2261161 is an apocalyptic number.

It is an amenable number.

2261161 is a deficient number, since it is larger than the sum of its proper divisors (333719).

2261161 is a wasteful number, since it uses less digits than its factorization.

2261161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343.

The product of its digits is 144, while the sum is 19.

The square root of 2261161 is about 1503.7157311141. The cubic root of 2261161 is about 131.2533798071.

Adding to 2261161 its reverse (1611622), we get a palindrome (3872783).

The spelling of 2261161 in words is "two million, two hundred sixty-one thousand, one hundred sixty-one".