1597897 has 16 divisors (see below), whose sum is σ = 1918080. Its totient is φ = 1302912.

The previous prime is 1597877. The next prime is 1597913. The reversal of 1597897 is 7987951.

It is a cyclic number.

It is not a de Polignac number, because 1597897 - 2¹⁵ = 1565129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1597877) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21853 + ... + 21925.

It is an arithmetic number, because the mean of its divisors is an integer number (119880).

2^1597897 is an apocalyptic number.

It is an amenable number.

1597897 is a deficient number, since it is larger than the sum of its proper divisors (320183).

1597897 is an equidigital number, since it uses as much as digits as its factorization.

1597897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192.

The product of its digits is 158760, while the sum is 46.

The square root of 1597897 is about 1264.0795069931. The cubic root of 1597897 is about 116.9094436502.

The spelling of 1597897 in words is "one million, five hundred ninety-seven thousand, eight hundred ninety-seven".