123550871 has 4 divisors (see below), whose sum is σ = 128922672. Its totient is φ = 118179072.

The previous prime is 123550837. The next prime is 123550873. The reversal of 123550871 is 178055321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 178055321 = 12289 ⋅14489.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123550871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123550873) 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 3 ways as a sum of consecutive naturals, for example, 2685866 + ... + 2685911.

It is an arithmetic number, because the mean of its divisors is an integer number (32230668).

Almost surely, 2^123550871 is an apocalyptic number.

123550871 is a deficient number, since it is larger than the sum of its proper divisors (5371801).

123550871 is an equidigital number, since it uses as much as digits as its factorization.

123550871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5371800.

The product of its (nonzero) digits is 8400, while the sum is 32.

The square root of 123550871 is about 11115.3439442961. The cubic root of 123550871 is about 498.0603129588.

It can be divided in two parts, 123550 and 871, that added together give a palindrome (124421).

The spelling of 123550871 in words is "one hundred twenty-three million, five hundred fifty thousand, eight hundred seventy-one".