121431250 has 24 divisors (see below), whose sum is σ = 227680740. Its totient is φ = 48570000.

The previous prime is 121431239. The next prime is 121431257. The reversal of 121431250 is 52134121.

It can be written as a sum of positive squares in 6 ways, for example, as 51825601 + 69605649 = 7199^2 + 8343^2 .

It is a super-3 number, since 3×121431250³ (a number of 25 digits) contains 333 as substring.

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 11 ways as a sum of consecutive naturals, for example, 3465 + ... + 15964.

Almost surely, 2^121431250 is an apocalyptic number.

121431250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121431250 is a deficient number, since it is larger than the sum of its proper divisors (106249490).

121431250 is an frugal number, since it uses more digits than its factorization.

121431250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19456 (or 19436 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 121431250 is about 11019.5848379147. The cubic root of 121431250 is about 495.1956509849.

Adding to 121431250 its reverse (52134121), we get a palindrome (173565371).

The spelling of 121431250 in words is "one hundred twenty-one million, four hundred thirty-one thousand, two hundred fifty".