123513161 has 8 divisors (see below), whose sum is σ = 126270144. Its totient is φ = 120772080.

The previous prime is 123513113. The next prime is 123513163. The reversal of 123513161 is 161315321.

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 123513161 - 2²⁶ = 56404297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123513163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12476 + ... + 20066.

It is an arithmetic number, because the mean of its divisors is an integer number (15783768).

Almost surely, 2^123513161 is an apocalyptic number.

It is an amenable number.

123513161 is a deficient number, since it is larger than the sum of its proper divisors (2756983).

123513161 is an equidigital number, since it uses as much as digits as its factorization.

123513161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7951.

The product of its digits is 540, while the sum is 23.

The square root of 123513161 is about 11113.6475110559. The cubic root of 123513161 is about 498.0096354108.

Adding to 123513161 its reverse (161315321), we get a palindrome (284828482).

The spelling of 123513161 in words is "one hundred twenty-three million, five hundred thirteen thousand, one hundred sixty-one".