121443525 has 72 divisors (see below), whose sum is σ = 251858880. Its totient is φ = 54789120.

The previous prime is 121443521. The next prime is 121443527. The reversal of 121443525 is 525344121.

It is not a de Polignac number, because 121443525 - 2² = 121443521 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121443521) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 130261 + ... + 131189.

It is an arithmetic number, because the mean of its divisors is an integer number (3498040).

Almost surely, 2^121443525 is an apocalyptic number.

121443525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121443525 is an abundant number, since it is smaller than the sum of its proper divisors (130415355).

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

121443525 is a wasteful number, since it uses less digits than its factorization.

121443525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1035 (or 1027 counting only the distinct ones).

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

The square root of 121443525 is about 11020.1417867467. The cubic root of 121443525 is about 495.2123362061.

Adding to 121443525 its reverse (525344121), we get a palindrome (646787646).

The spelling of 121443525 in words is "one hundred twenty-one million, four hundred forty-three thousand, five hundred twenty-five".