111971340 has 144 divisors (see below), whose sum is σ = 369969600. Its totient is φ = 27247104.

The previous prime is 111971339. The next prime is 111971341. The reversal of 111971340 is 43179111.

It is an interprime number because it is at equal distance from previous prime (111971339) and next prime (111971341).

It is not an unprimeable number, because it can be changed into a prime (111971341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 254841 + ... + 255279.

Almost surely, 2^111971340 is an apocalyptic number.

111971340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 111971340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (184984800).

111971340 is an abundant number, since it is smaller than the sum of its proper divisors (257998260).

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

111971340 is a wasteful number, since it uses less digits than its factorization.

111971340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 576 (or 571 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 27.

The square root of 111971340 is about 10581.6510998993. The cubic root of 111971340 is about 481.9873334481.

The spelling of 111971340 in words is "one hundred eleven million, nine hundred seventy-one thousand, three hundred forty".