123546161 has 4 divisors (see below), whose sum is σ = 126559524. Its totient is φ = 120532800.

The previous prime is 123546139. The next prime is 123546169. The reversal of 123546161 is 161645321.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161645321 = 1657 ⋅97553.

It can be written as a sum of positive squares in 2 ways, for example, as 12559936 + 110986225 = 3544^2 + 10535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123546161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123546169) 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, 1506620 + ... + 1506701.

It is an arithmetic number, because the mean of its divisors is an integer number (31639881).

Almost surely, 2^123546161 is an apocalyptic number.

It is an amenable number.

123546161 is a deficient number, since it is larger than the sum of its proper divisors (3013363).

123546161 is an equidigital number, since it uses as much as digits as its factorization.

123546161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3013362.

The product of its digits is 4320, while the sum is 29.

The square root of 123546161 is about 11115.1320729895. The cubic root of 123546161 is about 498.0539838685.

The spelling of 123546161 in words is "one hundred twenty-three million, five hundred forty-six thousand, one hundred sixty-one".