1997456 has 20 divisors (see below), whose sum is σ = 3904512. Its totient is φ = 989856.

The previous prime is 1997441. The next prime is 1997459. The reversal of 1997456 is 6547991.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (1997459) 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 3 ways as a sum of consecutive naturals, for example, 1541 + ... + 2523.

2^1997456 is an apocalyptic number.

1997456 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1997456 is a deficient number, since it is larger than the sum of its proper divisors (1907056).

1997456 is a wasteful number, since it uses less digits than its factorization.

1997456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1118 (or 1112 counting only the distinct ones).

The product of its digits is 68040, while the sum is 41.

The square root of 1997456 is about 1413.3138363435. The cubic root of 1997456 is about 125.9386616706.

The spelling of 1997456 in words is "one million, nine hundred ninety-seven thousand, four hundred fifty-six".