123315278 has 8 divisors (see below), whose sum is σ = 186385320. Its totient is φ = 61186840.

The previous prime is 123315277. The next prime is 123315281. The reversal of 123315278 is 872513321.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123315277) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 235073 + ... + 235596.

It is an arithmetic number, because the mean of its divisors is an integer number (23298165).

Almost surely, 2^123315278 is an apocalyptic number.

123315278 is a deficient number, since it is larger than the sum of its proper divisors (63070042).

123315278 is a wasteful number, since it uses less digits than its factorization.

123315278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 470802.

The product of its digits is 10080, while the sum is 32.

The square root of 123315278 is about 11104.7412396688. The cubic root of 123315278 is about 497.7435360597.

Adding to 123315278 its reverse (872513321), we get a palindrome (995828599).

The spelling of 123315278 in words is "one hundred twenty-three million, three hundred fifteen thousand, two hundred seventy-eight".