121136406 has 16 divisors (see below), whose sum is σ = 250088448. Its totient is φ = 39076200.

The previous prime is 121136399. The next prime is 121136453. The reversal of 121136406 is 604631121.

It is a congruent number.

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 325450 + ... + 325821.

It is an arithmetic number, because the mean of its divisors is an integer number (15630528).

Almost surely, 2^121136406 is an apocalyptic number.

121136406 is an abundant number, since it is smaller than the sum of its proper divisors (128952042).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121136406 is a wasteful number, since it uses less digits than its factorization.

121136406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 651307.

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 121136406 is about 11006.1985262851. The cubic root of 121136406 is about 494.7945356848.

Adding to 121136406 its reverse (604631121), we get a palindrome (725767527).

The spelling of 121136406 in words is "one hundred twenty-one million, one hundred thirty-six thousand, four hundred six".