997442 has 8 divisors (see below), whose sum is σ = 1501500. Its totient is φ = 496944.

The previous prime is 997439. The next prime is 997453. The reversal of 997442 is 244799.

It can be written as a sum of positive squares in 2 ways, for example, as 978121 + 19321 = 989^2 + 139^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a nialpdrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17 + ... + 1412.

2⁹⁹⁷⁴⁴² is an apocalyptic number.

997442 is a deficient number, since it is larger than the sum of its proper divisors (504058).

997442 is a wasteful number, since it uses less digits than its factorization.

997442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780.

The product of its digits is 18144, while the sum is 35.

The square root of 997442 is about 998.7201810317. The cubic root of 997442 is about 99.9146605258.

The spelling of 997442 in words is "nine hundred ninety-seven thousand, four hundred forty-two".