991412 has 6 divisors (see below), whose sum is σ = 1734978. Its totient is φ = 495704.

The previous prime is 991409. The next prime is 991427. The reversal of 991412 is 214199.

It can be written as a sum of positive squares in only one way, i.e., 682276 + 309136 = 826^2 + 556^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123923 + ... + 123930.

It is an arithmetic number, because the mean of its divisors is an integer number (289163).

2⁹⁹¹⁴¹² is an apocalyptic number.

It is an amenable number.

991412 is a deficient number, since it is larger than the sum of its proper divisors (743566).

991412 is a wasteful number, since it uses less digits than its factorization.

991412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 247857 (or 247855 counting only the distinct ones).

The product of its digits is 648, while the sum is 26.

The square root of 991412 is about 995.6967409809. The cubic root of 991412 is about 99.7129099149.

The spelling of 991412 in words is "nine hundred ninety-one thousand, four hundred twelve".