123405273 has 12 divisors (see below), whose sum is σ = 179150400. Its totient is φ = 81855576.

The previous prime is 123405251. The next prime is 123405277. The reversal of 123405273 is 372504321.

It is not a de Polignac number, because 123405273 - 2⁵ = 123405241 is a prime.

It is a super-2 number, since 2×123405273² = 30457722808409058, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123405277) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32661 + ... + 36242.

It is an arithmetic number, because the mean of its divisors is an integer number (14929200).

Almost surely, 2^123405273 is an apocalyptic number.

It is an amenable number.

123405273 is a deficient number, since it is larger than the sum of its proper divisors (55745127).

123405273 is a wasteful number, since it uses less digits than its factorization.

123405273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69108 (or 69105 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 123405273 is about 11108.7925986581. The cubic root of 123405273 is about 497.8645903680.

Adding to 123405273 its reverse (372504321), we get a palindrome (495909594).

The spelling of 123405273 in words is "one hundred twenty-three million, four hundred five thousand, two hundred seventy-three".