111742387 has 4 divisors (see below), whose sum is σ = 111814560. Its totient is φ = 111670216.

The previous prime is 111742381. The next prime is 111742403. The reversal of 111742387 is 783247111.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 111742387 - 2¹⁹ = 111218099 is a prime.

It is a super-2 number, since 2×111742387² = 24972722104915538, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111742381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33712 + ... + 36877.

It is an arithmetic number, because the mean of its divisors is an integer number (27953640).

Almost surely, 2^111742387 is an apocalyptic number.

111742387 is a deficient number, since it is larger than the sum of its proper divisors (72173).

111742387 is an equidigital number, since it uses as much as digits as its factorization.

111742387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72172.

The product of its digits is 9408, while the sum is 34.

The square root of 111742387 is about 10570.8271672561. The cubic root of 111742387 is about 481.6585953211.

Adding to 111742387 its reverse (783247111), we get a palindrome (894989498).

The spelling of 111742387 in words is "one hundred eleven million, seven hundred forty-two thousand, three hundred eighty-seven".