123271281 has 16 divisors (see below), whose sum is σ = 208713600. Its totient is φ = 70440624.

The previous prime is 123271273. The next prime is 123271307. The reversal of 123271281 is 182172321.

It is not a de Polignac number, because 123271281 - 2³ = 123271273 is a prime.

It is a super-2 number, since 2×123271281² = 30391617438761922, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (123271201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325926 + ... + 326303.

It is an arithmetic number, because the mean of its divisors is an integer number (13044600).

Almost surely, 2^123271281 is an apocalyptic number.

It is an amenable number.

123271281 is a deficient number, since it is larger than the sum of its proper divisors (85442319).

123271281 is an equidigital number, since it uses as much as digits as its factorization.

123271281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 652245 (or 652239 counting only the distinct ones).

The product of its digits is 1344, while the sum is 27.

The square root of 123271281 is about 11102.7600622548. The cubic root of 123271281 is about 497.6843332649.

The spelling of 123271281 in words is "one hundred twenty-three million, two hundred seventy-one thousand, two hundred eighty-one".