121732072 has 128 divisors (see below), whose sum is σ = 300960000. Its totient is φ = 45722880.

The previous prime is 121732067. The next prime is 121732073. The reversal of 121732072 is 270237121.

It is not an unprimeable number, because it can be changed into a prime (121732073) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1116754 + ... + 1116862.

It is an arithmetic number, because the mean of its divisors is an integer number (2351250).

Almost surely, 2^121732072 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121732072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150480000).

121732072 is an abundant number, since it is smaller than the sum of its proper divisors (179227928).

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

121732072 is a wasteful number, since it uses less digits than its factorization.

121732072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 184 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 121732072 is about 11033.2258202214. The cubic root of 121732072 is about 495.6042303362.

Adding to 121732072 its reverse (270237121), we get a palindrome (391969193).

The spelling of 121732072 in words is "one hundred twenty-one million, seven hundred thirty-two thousand, seventy-two".