121431252 has 24 divisors (see below), whose sum is σ = 283729600. Its totient is φ = 40421376.

The previous prime is 121431239. The next prime is 121431257. The reversal of 121431252 is 252134121.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121431257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2649 + ... + 15807.

Almost surely, 2^121431252 is an apocalyptic number.

121431252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121431252 is an abundant number, since it is smaller than the sum of its proper divisors (162298348).

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

121431252 is a wasteful number, since it uses less digits than its factorization.

121431252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13935 (or 13933 counting only the distinct ones).

The product of its digits is 480, while the sum is 21.

The square root of 121431252 is about 11019.5849286622. The cubic root of 121431252 is about 495.1956537036.

Adding to 121431252 its reverse (252134121), we get a palindrome (373565373).

The spelling of 121431252 in words is "one hundred twenty-one million, four hundred thirty-one thousand, two hundred fifty-two".