123021552 has 80 divisors (see below), whose sum is σ = 324979200. Its totient is φ = 40094976.

The previous prime is 123021551. The next prime is 123021553. The reversal of 123021552 is 255120321.

It is an interprime number because it is at equal distance from previous prime (123021551) and next prime (123021553).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123021551) 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, 736573 + ... + 736739.

It is an arithmetic number, because the mean of its divisors is an integer number (4062240).

Almost surely, 2^123021552 is an apocalyptic number.

123021552 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 123021552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (162489600).

123021552 is an abundant number, since it is smaller than the sum of its proper divisors (201957648).

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

123021552 is a wasteful number, since it uses less digits than its factorization.

123021552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 430 (or 424 counting only the distinct ones).

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 123021552 is about 11091.5081030489. The cubic root of 123021552 is about 497.3480282937.

Adding to 123021552 its reverse (255120321), we get a palindrome (378141873).

The spelling of 123021552 in words is "one hundred twenty-three million, twenty-one thousand, five hundred fifty-two".