123201280 has 72 divisors (see below), whose sum is σ = 305373600. Its totient is φ = 47566848.

The previous prime is 123201257. The next prime is 123201289. The reversal of 123201280 is 82102321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123201289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35461 + ... + 38779.

It is an arithmetic number, because the mean of its divisors is an integer number (4241300).

Almost surely, 2^123201280 is an apocalyptic number.

123201280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123201280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152686800).

123201280 is an abundant number, since it is smaller than the sum of its proper divisors (182172320).

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

123201280 is an equidigital number, since it uses as much as digits as its factorization.

123201280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3369 (or 3355 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 123201280 is about 11099.6072002571. The cubic root of 123201280 is about 497.5901101897.

The spelling of 123201280 in words is "one hundred twenty-three million, two hundred one thousand, two hundred eighty".