121542160 has 20 divisors (see below), whose sum is σ = 282585708. Its totient is φ = 48616832.

The previous prime is 121542149. The next prime is 121542167. The reversal of 121542160 is 61245121.

It can be written as a sum of positive squares in 2 ways, for example, as 89415936 + 32126224 = 9456^2 + 5668^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (121542167) 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 in 3 ways as a sum of consecutive naturals, for example, 759559 + ... + 759718.

Almost surely, 2^121542160 is an apocalyptic number.

121542160 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

121542160 is an abundant number, since it is smaller than the sum of its proper divisors (161043548).

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

121542160 is a wasteful number, since it uses less digits than its factorization.

121542160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1519290 (or 1519284 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 121542160 is about 11024.6160930891. The cubic root of 121542160 is about 495.3463684676.

Adding to 121542160 its reverse (61245121), we get a palindrome (182787281).

The spelling of 121542160 in words is "one hundred twenty-one million, five hundred forty-two thousand, one hundred sixty".