1997595 has 16 divisors (see below), whose sum is σ = 3551520. Its totient is φ = 1065312.

The previous prime is 1997591. The next prime is 1997599. The reversal of 1997595 is 5957991.

It is an interprime number because it is at equal distance from previous prime (1997591) and next prime (1997599).

It is not a de Polignac number, because 1997595 - 2² = 1997591 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

1997595 is a lucky number.

It is a self number, because there is not a number n which added to its sum of digits gives 1997595.

It is not an unprimeable number, because it can be changed into a prime (1997591) 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, 7264 + ... + 7533.

It is an arithmetic number, because the mean of its divisors is an integer number (221970).

2^1997595 is an apocalyptic number.

1997595 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1997595 is a deficient number, since it is larger than the sum of its proper divisors (1553925).

1997595 is a wasteful number, since it uses less digits than its factorization.

1997595 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14811 (or 14805 counting only the distinct ones).

The product of its digits is 127575, while the sum is 45.

The square root of 1997595 is about 1413.3630106947. The cubic root of 1997595 is about 125.9415828977.

The spelling of 1997595 in words is "one million, nine hundred ninety-seven thousand, five hundred ninety-five".