121838536 has 8 divisors (see below), whose sum is σ = 228447270. Its totient is φ = 60919264.

The previous prime is 121838491. The next prime is 121838539. The reversal of 121838536 is 635838121.

It can be written as a sum of positive squares in only one way, i.e., 84750436 + 37088100 = 9206^2 + 6090^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 121838495 and 121838504.

It is not an unprimeable number, because it can be changed into a prime (121838539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7614901 + ... + 7614916.

Almost surely, 2^121838536 is an apocalyptic number.

It is an amenable number.

121838536 is a deficient number, since it is larger than the sum of its proper divisors (106608734).

121838536 is a wasteful number, since it uses less digits than its factorization.

121838536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15229823 (or 15229819 counting only the distinct ones).

The product of its digits is 34560, while the sum is 37.

The square root of 121838536 is about 11038.0494653720. The cubic root of 121838536 is about 495.7486694949.

The spelling of 121838536 in words is "one hundred twenty-one million, eight hundred thirty-eight thousand, five hundred thirty-six".