121538807 has 8 divisors (see below), whose sum is σ = 130981200. Its totient is φ = 112109760.

The previous prime is 121538783. The next prime is 121538827. The reversal of 121538807 is 708835121.

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 121538807 - 2⁸ = 121538551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121538827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23819 + ... + 28467.

It is an arithmetic number, because the mean of its divisors is an integer number (16372650).

Almost surely, 2^121538807 is an apocalyptic number.

121538807 is a deficient number, since it is larger than the sum of its proper divisors (9442393).

121538807 is a wasteful number, since it uses less digits than its factorization.

121538807 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6673.

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 121538807 is about 11024.4640232530. The cubic root of 121538807 is about 495.3418133633.

The spelling of 121538807 in words is "one hundred twenty-one million, five hundred thirty-eight thousand, eight hundred seven".