121543452 has 36 divisors (see below), whose sum is σ = 307583640. Its totient is φ = 40468512.

The previous prime is 121543441. The next prime is 121543453. The reversal of 121543452 is 254345121.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121543453) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48199 + ... + 50657.

It is an arithmetic number, because the mean of its divisors is an integer number (8543990).

Almost surely, 2^121543452 is an apocalyptic number.

121543452 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121543452 is an abundant number, since it is smaller than the sum of its proper divisors (186040188).

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

121543452 is a wasteful number, since it uses less digits than its factorization.

121543452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3842 (or 3837 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 121543452 is about 11024.6746890781. The cubic root of 121543452 is about 495.3481236480.

Adding to 121543452 its reverse (254345121), we get a palindrome (375888573).

The spelling of 121543452 in words is "one hundred twenty-one million, five hundred forty-three thousand, four hundred fifty-two".