1155897 has 16 divisors (see below), whose sum is σ = 1768960. Its totient is φ = 745200.

The previous prime is 1155863. The next prime is 1155899. The reversal of 1155897 is 7985511.

1155897 is a `hidden beast` number, since 11 + 558 + 97 = 666.

It is not a de Polignac number, because 1155897 - 2¹¹ = 1153849 is a prime.

It is a Duffinian number.

1155897 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (1155899) 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, 147 + ... + 1527.

It is an arithmetic number, because the mean of its divisors is an integer number (110560).

2^1155897 is an apocalyptic number.

It is an amenable number.

1155897 is a deficient number, since it is larger than the sum of its proper divisors (613063).

1155897 is a wasteful number, since it uses less digits than its factorization.

1155897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1421 (or 1415 counting only the distinct ones).

The product of its digits is 12600, while the sum is 36.

The square root of 1155897 is about 1075.1265041845. The cubic root of 1155897 is about 104.9477290849.

The spelling of 1155897 in words is "one million, one hundred fifty-five thousand, eight hundred ninety-seven".