123181104 has 80 divisors (see below), whose sum is σ = 345850880. Its totient is φ = 37635840.

The previous prime is 123181087. The next prime is 123181109. The reversal of 123181104 is 401181321.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (123181109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26094 + ... + 30450.

It is an arithmetic number, because the mean of its divisors is an integer number (4323136).

Almost surely, 2^123181104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123181104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (172925440).

123181104 is an abundant number, since it is smaller than the sum of its proper divisors (222669776).

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

123181104 is a wasteful number, since it uses less digits than its factorization.

123181104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4418 (or 4412 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 21.

The square root of 123181104 is about 11098.6983020533. The cubic root of 123181104 is about 497.5629461696.

The spelling of 123181104 in words is "one hundred twenty-three million, one hundred eighty-one thousand, one hundred four".