997405 has 8 divisors (see below), whose sum is σ = 1260000. Its totient is φ = 755856.

The previous prime is 997391. The next prime is 997427. The reversal of 997405 is 504799.

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

It is a cyclic number.

It is not a de Polignac number, because 997405 - 2¹⁵ = 964637 is a prime.

It is a congruent number.

It is an unprimeable 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, 5155 + ... + 5344.

It is an arithmetic number, because the mean of its divisors is an integer number (157500).

2⁹⁹⁷⁴⁰⁵ is an apocalyptic number.

997405 is a gapful number since it is divisible by the number (95) formed by its first and last digit.

It is an amenable number.

997405 is a deficient number, since it is larger than the sum of its proper divisors (262595).

997405 is a wasteful number, since it uses less digits than its factorization.

997405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10523.

The product of its (nonzero) digits is 11340, while the sum is 34.

The square root of 997405 is about 998.7016571529. The cubic root of 997405 is about 99.9134250694.

The spelling of 997405 in words is "nine hundred ninety-seven thousand, four hundred five".