123961278 has 48 divisors (see below), whose sum is σ = 294568704. Its totient is φ = 34660080.

The previous prime is 123961273. The next prime is 123961361. The reversal of 123961278 is 872169321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123961273) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9333 + ... + 18303.

It is an arithmetic number, because the mean of its divisors is an integer number (6136848).

Almost surely, 2^123961278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123961278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147284352).

123961278 is an abundant number, since it is smaller than the sum of its proper divisors (170607426).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123961278 is a wasteful number, since it uses less digits than its factorization.

123961278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9037 (or 9030 counting only the distinct ones).

The product of its digits is 36288, while the sum is 39.

The square root of 123961278 is about 11133.7899207772. The cubic root of 123961278 is about 498.6111832813.

The spelling of 123961278 in words is "one hundred twenty-three million, nine hundred sixty-one thousand, two hundred seventy-eight".