121530517 has 8 divisors (see below), whose sum is σ = 128030400. Its totient is φ = 115041024.

The previous prime is 121530499. The next prime is 121530523. The reversal of 121530517 is 715035121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121530517 - 2¹⁹ = 121006229 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121530491 and 121530500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121530547) 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, 37173 + ... + 40309.

It is an arithmetic number, because the mean of its divisors is an integer number (16003800).

Almost surely, 2^121530517 is an apocalyptic number.

It is an amenable number.

121530517 is a deficient number, since it is larger than the sum of its proper divisors (6499883).

121530517 is a wasteful number, since it uses less digits than its factorization.

121530517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5195.

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 121530517 is about 11024.0880348444. The cubic root of 121530517 is about 495.3305509057.

Adding to 121530517 its reverse (715035121), we get a palindrome (836565638).

The spelling of 121530517 in words is "one hundred twenty-one million, five hundred thirty thousand, five hundred seventeen".