997042 has 4 divisors (see below), whose sum is σ = 1495566. Its totient is φ = 498520.

The previous prime is 997037. The next prime is 997043. The reversal of 997042 is 240799.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 240799 = 13 ⋅18523.

It can be written as a sum of positive squares in only one way, i.e., 938961 + 58081 = 969^2 + 241^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 996995 and 997013.

It is not an unprimeable number, because it can be changed into a prime (997043) by changing a digit.

997042 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 249259 + ... + 249262.

2⁹⁹⁷⁰⁴² is an apocalyptic number.

997042 is a deficient number, since it is larger than the sum of its proper divisors (498524).

997042 is a wasteful number, since it uses less digits than its factorization.

997042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498523.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 997042 is about 998.5199046589. The cubic root of 997042 is about 99.9013026203.

It can be divided in two parts, 9 and 97042, that multiplied together give a palindrome (873378).

The spelling of 997042 in words is "nine hundred ninety-seven thousand, forty-two".