123531450 has 96 divisors (see below), whose sum is σ = 357417600. Its totient is φ = 28235760.

The previous prime is 123531449. The next prime is 123531479. The reversal of 123531450 is 54135321.

It is a self number, because there is not a number n which added to its sum of digits gives 123531450.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 17647347 + ... + 17647353.

It is an arithmetic number, because the mean of its divisors is an integer number (3723100).

Almost surely, 2^123531450 is an apocalyptic number.

123531450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 123531450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (178708800).

123531450 is an abundant number, since it is smaller than the sum of its proper divisors (233886150).

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

123531450 is an frugal number, since it uses more digits than its factorization.

123531450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64 (or 17 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 123531450 is about 11114.4702977695. The cubic root of 123531450 is about 498.0342148393.

Adding to 123531450 its reverse (54135321), we get a palindrome (177666771).

The spelling of 123531450 in words is "one hundred twenty-three million, five hundred thirty-one thousand, four hundred fifty".