111861149 has 8 divisors (see below), whose sum is σ = 115837560. Its totient is φ = 107892736.

The previous prime is 111861143. The next prime is 111861157. The reversal of 111861149 is 941168111.

It can be written as a sum of positive squares in 4 ways, for example, as 71284249 + 40576900 = 8443^2 + 6370^2 .

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-111861149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111861143) 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 7 ways as a sum of consecutive naturals, for example, 48077 + ... + 50349.

It is an arithmetic number, because the mean of its divisors is an integer number (14479695).

Almost surely, 2^111861149 is an apocalyptic number.

It is an amenable number.

111861149 is a deficient number, since it is larger than the sum of its proper divisors (3976411).

111861149 is a wasteful number, since it uses less digits than its factorization.

111861149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3999.

The product of its digits is 1728, while the sum is 32.

The square root of 111861149 is about 10576.4431166626. The cubic root of 111861149 is about 481.8291736373.

The spelling of 111861149 in words is "one hundred eleven million, eight hundred sixty-one thousand, one hundred forty-nine".