121532530 has 16 divisors (see below), whose sum is σ = 250009920. Its totient is φ = 41668272.

The previous prime is 121532527. The next prime is 121532539. The reversal of 121532530 is 35235121.

It is not an unprimeable number, because it can be changed into a prime (121532539) 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, 868020 + ... + 868159.

It is an arithmetic number, because the mean of its divisors is an integer number (15625620).

Almost surely, 2^121532530 is an apocalyptic number.

121532530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121532530 is an abundant number, since it is smaller than the sum of its proper divisors (128477390).

121532530 is a wasteful number, since it uses less digits than its factorization.

121532530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1736193.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 121532530 is about 11024.1793345355. The cubic root of 121532530 is about 495.3332857329. Note that the first 3 decimals are identical.

Adding to 121532530 its reverse (35235121), we get a palindrome (156767651).

The spelling of 121532530 in words is "one hundred twenty-one million, five hundred thirty-two thousand, five hundred thirty".