121475813 has 8 divisors (see below), whose sum is σ = 123129600. Its totient is φ = 119832048.

The previous prime is 121475807. The next prime is 121475843. The reversal of 121475813 is 318574121.

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 121475813 - 2¹⁰ = 121474789 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 121475813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121475843) 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, 23720 + ... + 28382.

It is an arithmetic number, because the mean of its divisors is an integer number (15391200).

Almost surely, 2^121475813 is an apocalyptic number.

It is an amenable number.

121475813 is a deficient number, since it is larger than the sum of its proper divisors (1653787).

121475813 is a wasteful number, since it uses less digits than its factorization.

121475813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5011.

The product of its digits is 6720, while the sum is 32.

The square root of 121475813 is about 11021.6066433166. The cubic root of 121475813 is about 495.2562194270.

The spelling of 121475813 in words is "one hundred twenty-one million, four hundred seventy-five thousand, eight hundred thirteen".