1161897 has 16 divisors (see below), whose sum is σ = 1708992. Its totient is φ = 696320.

The previous prime is 1161893. The next prime is 1161929. The reversal of 1161897 is 7981611.

It is a cyclic number.

It is not a de Polignac number, because 1161897 - 2² = 1161893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (1161893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4393 + ... + 4649.

It is an arithmetic number, because the mean of its divisors is an integer number (106812).

2^1161897 is an apocalyptic number.

It is an amenable number.

1161897 is a deficient number, since it is larger than the sum of its proper divisors (547095).

1161897 is a wasteful number, since it uses less digits than its factorization.

1161897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408.

The product of its digits is 3024, while the sum is 33.

The square root of 1161897 is about 1077.9132618166. The cubic root of 1161897 is about 105.1290024411.

The spelling of 1161897 in words is "one million, one hundred sixty-one thousand, eight hundred ninety-seven".