1597489 has 2 divisors, whose sum is σ = 1597490. Its totient is φ = 1597488.

The previous prime is 1597469. The next prime is 1597499. The reversal of 1597489 is 9847951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 970225 + 627264 = 985^2 + 792^2 .

It is a cyclic number.

It is not a de Polignac number, because 1597489 - 2⁵ = 1597457 is a prime.

It is a super-2 number, since 2×1597489² = 5103942210242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1597469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 798744 + 798745.

It is an arithmetic number, because the mean of its divisors is an integer number (798745).

2^1597489 is an apocalyptic number.

It is an amenable number.

1597489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1597489 is an equidigital number, since it uses as much as digits as its factorization.

1597489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 43.

The square root of 1597489 is about 1263.9181144362. The cubic root of 1597489 is about 116.8994924220.

The spelling of 1597489 in words is "one million, five hundred ninety-seven thousand, four hundred eighty-nine".