121534164 has 36 divisors (see below), whose sum is σ = 307783476. Its totient is φ = 40435968.

The previous prime is 121534121. The next prime is 121534169. The reversal of 121534164 is 461435121.

It is a happy number.

121534164 is a `hidden beast` number, since 121 + 534 + 1 + 6 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 42146064 + 79388100 = 6492^2 + 8910^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121534169) 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 11 ways as a sum of consecutive naturals, for example, 18502 + ... + 24194.

It is an arithmetic number, because the mean of its divisors is an integer number (8549541).

Almost surely, 2^121534164 is an apocalyptic number.

It is an amenable number.

121534164 is an abundant number, since it is smaller than the sum of its proper divisors (186249312).

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

121534164 is a wasteful number, since it uses less digits than its factorization.

121534164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6296 (or 6291 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 121534164 is about 11024.2534441113. The cubic root of 121534164 is about 495.3355056350.

Adding to 121534164 its reverse (461435121), we get a palindrome (582969285).

The spelling of 121534164 in words is "one hundred twenty-one million, five hundred thirty-four thousand, one hundred sixty-four".