1997127 has 12 divisors (see below), whose sum is σ = 3147144. Its totient is φ = 1210320.

The previous prime is 1997119. The next prime is 1997129. The reversal of 1997127 is 7217991.

It is not a de Polignac number, because 1997127 - 2³ = 1997119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1997091 and 1997100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1997129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9988 + ... + 10185.

It is an arithmetic number, because the mean of its divisors is an integer number (262262).

2^1997127 is an apocalyptic number.

1997127 is a deficient number, since it is larger than the sum of its proper divisors (1150017).

1997127 is a wasteful number, since it uses less digits than its factorization.

1997127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20190 (or 20187 counting only the distinct ones).

The product of its digits is 7938, while the sum is 36.

The square root of 1997127 is about 1413.1974384353. The cubic root of 1997127 is about 125.9317468592.

The spelling of 1997127 in words is "one million, nine hundred ninety-seven thousand, one hundred twenty-seven".