123331572 has 240 divisors, whose sum is σ = 409812480. Its totient is φ = 31477248.

The previous prime is 123331541. The next prime is 123331573. The reversal of 123331572 is 275133321.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123331573) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1385704 + ... + 1385792.

It is an arithmetic number, because the mean of its divisors is an integer number (1707552).

Almost surely, 2^123331572 is an apocalyptic number.

123331572 is a gapful number since it is divisible by the number (12) 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 123331572, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204906240).

123331572 is an abundant number, since it is smaller than the sum of its proper divisors (286480908).

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

123331572 is a wasteful number, since it uses less digits than its factorization.

123331572 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 161 counting only the distinct ones).

The product of its digits is 3780, while the sum is 27.

The square root of 123331572 is about 11105.4748660289. The cubic root of 123331572 is about 497.7654578527.

Adding to 123331572 its reverse (275133321), we get a palindrome (398464893).

The spelling of 123331572 in words is "one hundred twenty-three million, three hundred thirty-one thousand, five hundred seventy-two".