391112 has 8 divisors (see below), whose sum is σ = 733350. Its totient is φ = 195552.

The previous prime is 391103. The next prime is 391117. The reversal of 391112 is 211193.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 320356 + 70756 = 566^2 + 266^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (391117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24437 + ... + 24452.

2³⁹¹¹¹² is an apocalyptic number.

It is an amenable number.

391112 is a deficient number, since it is larger than the sum of its proper divisors (342238).

391112 is a wasteful number, since it uses less digits than its factorization.

391112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48895 (or 48891 counting only the distinct ones).

The product of its digits is 54, while the sum is 17.

The square root of 391112 is about 625.3894786451. The cubic root of 391112 is about 73.1308094345.

The spelling of 391112 in words is "three hundred ninety-one thousand, one hundred twelve".