997256 has 32 divisors (see below), whose sum is σ = 2069760. Its totient is φ = 447552.

The previous prime is 997247. The next prime is 997259. The reversal of 997256 is 652799.

997256 is nontrivially palindromic in base 7.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 997256.

It is not an unprimeable number, because it can be changed into a prime (997259) by changing a digit.

997256 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4361 + ... + 4583.

It is an arithmetic number, because the mean of its divisors is an integer number (64680).

2⁹⁹⁷²⁵⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 997256, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1034880).

997256 is an abundant number, since it is smaller than the sum of its proper divisors (1072504).

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

997256 is a wasteful number, since it uses less digits than its factorization.

997256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285 (or 281 counting only the distinct ones).

The product of its digits is 34020, while the sum is 38.

The square root of 997256 is about 998.6270575145. The cubic root of 997256 is about 99.9084495441.

The spelling of 997256 in words is "nine hundred ninety-seven thousand, two hundred fifty-six".