2258161 has 4 divisors (see below), whose sum is σ = 2391012. Its totient is φ = 2125312.

The previous prime is 2258149. The next prime is 2258167. The reversal of 2258161 is 1618522.

2258161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1618522 = 2 ⋅809261.

It can be written as a sum of positive squares in 2 ways, for example, as 680625 + 1577536 = 825^2 + 1256^2 .

It is a cyclic number.

It is not a de Polignac number, because 2258161 - 2⁵ = 2258129 is a prime.

It is a super-2 number, since 2×2258161² = 10198582203842, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2258167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66400 + ... + 66433.

It is an arithmetic number, because the mean of its divisors is an integer number (597753).

2^2258161 is an apocalyptic number.

It is an amenable number.

2258161 is a deficient number, since it is larger than the sum of its proper divisors (132851).

2258161 is a wasteful number, since it uses less digits than its factorization.

2258161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132850.

The product of its digits is 960, while the sum is 25.

The square root of 2258161 is about 1502.7178710590. The cubic root of 2258161 is about 131.1953072199.

The spelling of 2258161 in words is "two million, two hundred fifty-eight thousand, one hundred sixty-one".