23121252 has 144 divisors (see below), whose sum is σ = 76876800. Its totient is φ = 5676480.

The previous prime is 23121247. The next prime is 23121281. The reversal of 23121252 is 25212132.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 52449 + ... + 52887.

Almost surely, 2^23121252 is an apocalyptic number.

23121252 is a gapful number since it is divisible by the number (22) 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 23121252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38438400).

23121252 is an abundant number, since it is smaller than the sum of its proper divisors (53755548).

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

23121252 is a wasteful number, since it uses less digits than its factorization.

23121252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486 (or 481 counting only the distinct ones).

The product of its digits is 240, while the sum is 18.

The square root of 23121252 is about 4808.4563011428. The cubic root of 23121252 is about 284.8855680951.

Adding to 23121252 its reverse (25212132), we get a palindrome (48333384).

The spelling of 23121252 in words is "twenty-three million, one hundred twenty-one thousand, two hundred fifty-two".