123254878 has 4 divisors (see below), whose sum is σ = 184882320. Its totient is φ = 61627438.

The previous prime is 123254837. The next prime is 123254921. The reversal of 123254878 is 878452321.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 123254878.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30813718 + ... + 30813721.

It is an arithmetic number, because the mean of its divisors is an integer number (46220580).

Almost surely, 2^123254878 is an apocalyptic number.

123254878 is a deficient number, since it is larger than the sum of its proper divisors (61627442).

123254878 is an equidigital number, since it uses as much as digits as its factorization.

123254878 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61627441.

The product of its digits is 107520, while the sum is 40.

The square root of 123254878 is about 11102.0213474844. The cubic root of 123254878 is about 497.6622576223.

The spelling of 123254878 in words is "one hundred twenty-three million, two hundred fifty-four thousand, eight hundred seventy-eight".