112720391 has 16 divisors (see below), whose sum is σ = 131459328. Its totient is φ = 94660800.

The previous prime is 112720379. The next prime is 112720393. The reversal of 112720391 is 193027211.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-112720391 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 112720391.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (112720393) 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 15 ways as a sum of consecutive naturals, for example, 75371 + ... + 76851.

It is an arithmetic number, because the mean of its divisors is an integer number (8216208).

Almost surely, 2^112720391 is an apocalyptic number.

112720391 is a deficient number, since it is larger than the sum of its proper divisors (18738937).

112720391 is a wasteful number, since it uses less digits than its factorization.

112720391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1702.

The product of its (nonzero) digits is 756, while the sum is 26.

The square root of 112720391 is about 10616.9859658945. The cubic root of 112720391 is about 483.0597239637.

The spelling of 112720391 in words is "one hundred twelve million, seven hundred twenty thousand, three hundred ninety-one".