123541161 has 4 divisors (see below), whose sum is σ = 164721552. Its totient is φ = 82360772.

The previous prime is 123541157. The next prime is 123541177. The reversal of 123541161 is 161145321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 161145321 = 3 ⋅53715107.

It is a cyclic number.

It is not a de Polignac number, because 123541161 - 2² = 123541157 is a prime.

It is a super-2 number, since 2×123541161² = 30524836922455842, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123541111) 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, 20590191 + ... + 20590196.

It is an arithmetic number, because the mean of its divisors is an integer number (41180388).

Almost surely, 2^123541161 is an apocalyptic number.

It is an amenable number.

123541161 is a deficient number, since it is larger than the sum of its proper divisors (41180391).

123541161 is an equidigital number, since it uses as much as digits as its factorization.

123541161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41180390.

The product of its digits is 720, while the sum is 24.

The square root of 123541161 is about 11114.9071521088. The cubic root of 123541161 is about 498.0472649129.

Adding to 123541161 its reverse (161145321), we get a palindrome (284686482).

The spelling of 123541161 in words is "one hundred twenty-three million, five hundred forty-one thousand, one hundred sixty-one".