121305525 has 36 divisors (see below), whose sum is σ = 220465056. Its totient is φ = 58810400.

The previous prime is 121305517. The next prime is 121305529. The reversal of 121305525 is 525503121.

It is a happy number.

It is not a de Polignac number, because 121305525 - 2³ = 121305517 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121305495 and 121305504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121305529) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2392 + ... + 15758.

Almost surely, 2^121305525 is an apocalyptic number.

121305525 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121305525 is a deficient number, since it is larger than the sum of its proper divisors (99159531).

121305525 is a wasteful number, since it uses less digits than its factorization.

121305525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13402 (or 13386 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 24.

The square root of 121305525 is about 11013.8787445659. The cubic root of 121305525 is about 495.0246901265.

Adding to 121305525 its reverse (525503121), we get a palindrome (646808646).

The spelling of 121305525 in words is "one hundred twenty-one million, three hundred five thousand, five hundred twenty-five".