111139972 has 6 divisors (see below), whose sum is σ = 194494958. Its totient is φ = 55569984.

The previous prime is 111139969. The next prime is 111140027. The reversal of 111139972 is 279931111.

It can be written as a sum of positive squares in only one way, i.e., 76282756 + 34857216 = 8734^2 + 5904^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13892493 + ... + 13892500.

Almost surely, 2^111139972 is an apocalyptic number.

It is an amenable number.

111139972 is a deficient number, since it is larger than the sum of its proper divisors (83354986).

111139972 is a wasteful number, since it uses less digits than its factorization.

111139972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27784997 (or 27784995 counting only the distinct ones).

The product of its digits is 3402, while the sum is 34.

The square root of 111139972 is about 10542.2944371707. The cubic root of 111139972 is about 480.7914777703.

The spelling of 111139972 in words is "one hundred eleven million, one hundred thirty-nine thousand, nine hundred seventy-two".