123011304 has 128 divisors (see below), whose sum is σ = 347276160. Its totient is φ = 36062208.

The previous prime is 123011299. The next prime is 123011309. The reversal of 123011304 is 403110321.

It is an interprime number because it is at equal distance from previous prime (123011299) and next prime (123011309).

It is not an unprimeable number, because it can be changed into a prime (123011309) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 710962 + ... + 711134.

It is an arithmetic number, because the mean of its divisors is an integer number (2713095).

Almost surely, 2^123011304 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 123011304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173638080).

123011304 is an abundant number, since it is smaller than the sum of its proper divisors (224264856).

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

123011304 is a wasteful number, since it uses less digits than its factorization.

123011304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 291 (or 287 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 123011304 is about 11091.0461183786. The cubic root of 123011304 is about 497.3342178027.

Adding to 123011304 its reverse (403110321), we get a palindrome (526121625).

The spelling of 123011304 in words is "one hundred twenty-three million, eleven thousand, three hundred four".