123161271 has 8 divisors (see below), whose sum is σ = 168653424. Its totient is φ = 79888320.

The previous prime is 123161239. The next prime is 123161273. The reversal of 123161271 is 172161321.

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

It is not a de Polignac number, because 123161271 - 2⁵ = 123161239 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123161273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 554670 + ... + 554891.

It is an arithmetic number, because the mean of its divisors is an integer number (21081678).

Almost surely, 2^123161271 is an apocalyptic number.

123161271 is a deficient number, since it is larger than the sum of its proper divisors (45492153).

123161271 is a wasteful number, since it uses less digits than its factorization.

123161271 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109601.

The product of its digits is 504, while the sum is 24.

The square root of 123161271 is about 11097.8047829289. The cubic root of 123161271 is about 497.5362410575.

Subtracting 123161271 from its reverse (172161321), we obtain a triangular number (49000050 = T₉₈₉₉).

The spelling of 123161271 in words is "one hundred twenty-three million, one hundred sixty-one thousand, two hundred seventy-one".