1997504 has 42 divisors (see below), whose sum is σ = 4213860. Its totient is φ = 939136.

The previous prime is 1997503. The next prime is 1997507. The reversal of 1997504 is 4057991.

It is not an unprimeable number, because it can be changed into a prime (1997503) 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 5 ways as a sum of consecutive naturals, for example, 33827 + ... + 33885.

It is an arithmetic number, because the mean of its divisors is an integer number (100330).

2^1997504 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1997504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2106930).

1997504 is an abundant number, since it is smaller than the sum of its proper divisors (2216356).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1997504 is an equidigital number, since it uses as much as digits as its factorization.

1997504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117 (or 84 counting only the distinct ones).

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

The square root of 1997504 is about 1413.3308176078. The cubic root of 1997504 is about 125.9396704550.

The spelling of 1997504 in words is "one million, nine hundred ninety-seven thousand, five hundred four".