997451 has 16 divisors (see below), whose sum is σ = 1251264. Its totient is φ = 774144.

The previous prime is 997439. The next prime is 997453. The reversal of 997451 is 154799.

It is not a de Polignac number, because 997451 - 2¹⁴ = 981067 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (997453) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 8771 + ... + 8883.

It is an arithmetic number, because the mean of its divisors is an integer number (78204).

2⁹⁹⁷⁴⁵¹ is an apocalyptic number.

997451 is a gapful number since it is divisible by the number (91) formed by its first and last digit.

997451 is a deficient number, since it is larger than the sum of its proper divisors (253813).

997451 is a wasteful number, since it uses less digits than its factorization.

997451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230.

The product of its digits is 11340, while the sum is 35.

The square root of 997451 is about 998.7246867881. The cubic root of 997451 is about 99.9149610376.

The spelling of 997451 in words is "nine hundred ninety-seven thousand, four hundred fifty-one".