1597240 has 32 divisors (see below), whose sum is σ = 3649680. Its totient is φ = 628992.

The previous prime is 1597229. The next prime is 1597243. The reversal of 1597240 is 427951.

It is a happy number.

1597240 is nontrivially palindromic in base 3.

It is a junction number, because it is equal to n+sod(n) for n = 1597199 and 1597208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1597243) 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 7 ways as a sum of consecutive naturals, for example, 2647 + ... + 3193.

2^1597240 is an apocalyptic number.

1597240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1597240 is the 730-th octagonal number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1597240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1824840).

1597240 is an abundant number, since it is smaller than the sum of its proper divisors (2052440).

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

1597240 is a wasteful number, since it uses less digits than its factorization.

1597240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 631 (or 627 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 1597240 is about 1263.8196073807. The cubic root of 1597240 is about 116.8934184133.

The spelling of 1597240 in words is "one million, five hundred ninety-seven thousand, two hundred forty".