1997135 has 16 divisors (see below), whose sum is σ = 2804736. Its totient is φ = 1336608.

The previous prime is 1997129. The next prime is 1997137. The reversal of 1997135 is 5317991.

It is not a de Polignac number, because 1997135 - 2⁴ = 1997119 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1997095 and 1997104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997137) 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, 842 + ... + 2168.

It is an arithmetic number, because the mean of its divisors is an integer number (175296).

2^1997135 is an apocalyptic number.

1997135 is a deficient number, since it is larger than the sum of its proper divisors (807601).

1997135 is a wasteful number, since it uses less digits than its factorization.

1997135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1382.

The product of its digits is 8505, while the sum is 35.

The square root of 1997135 is about 1413.2002688933. The cubic root of 1997135 is about 125.9319150095.

The spelling of 1997135 in words is "one million, nine hundred ninety-seven thousand, one hundred thirty-five".