291012 has 12 divisors (see below), whose sum is σ = 679056. Its totient is φ = 97000.

The previous prime is 291007. The next prime is 291013. The reversal of 291012 is 210192.

It is a happy number.

291012 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 290982 and 291000.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 291012.

It is not an unprimeable number, because it can be changed into a prime (291013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12114 + ... + 12137.

It is an arithmetic number, because the mean of its divisors is an integer number (56588).

2²⁹¹⁰¹² is an apocalyptic number.

It is an amenable number.

291012 is an abundant number, since it is smaller than the sum of its proper divisors (388044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

291012 is a wasteful number, since it uses less digits than its factorization.

291012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24258 (or 24256 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 291012 is about 539.4552808158. The cubic root of 291012 is about 66.2679647496.

The spelling of 291012 in words is "two hundred ninety-one thousand, twelve".