112721129 has 8 divisors (see below), whose sum is σ = 121861440. Its totient is φ = 103901616.

The previous prime is 112721123. The next prime is 112721149. The reversal of 112721129 is 921127211.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-112721129 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 112721098 and 112721107.

It is not an unprimeable number, because it can be changed into a prime (112721123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79469 + ... + 80874.

It is an arithmetic number, because the mean of its divisors is an integer number (15232680).

Almost surely, 2^112721129 is an apocalyptic number.

112721129 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

112721129 is a deficient number, since it is larger than the sum of its proper divisors (9140311).

112721129 is a wasteful number, since it uses less digits than its factorization.

112721129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160399.

The product of its digits is 504, while the sum is 26.

The square root of 112721129 is about 10617.0207214642. The cubic root of 112721129 is about 483.0607781867.

The spelling of 112721129 in words is "one hundred twelve million, seven hundred twenty-one thousand, one hundred twenty-nine".