1151897 has 4 divisors (see below), whose sum is σ = 1154256. Its totient is φ = 1149540.

The previous prime is 1151881. The next prime is 1151911. The reversal of 1151897 is 7981511.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7981511 = 41 ⋅194671.

It is a cyclic number.

It is not a de Polignac number, because 1151897 - 2⁴ = 1151881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1151807) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143 + ... + 1524.

It is an arithmetic number, because the mean of its divisors is an integer number (288564).

2^1151897 is an apocalyptic number.

It is an amenable number.

1151897 is a deficient number, since it is larger than the sum of its proper divisors (2359).

1151897 is an equidigital number, since it uses as much as digits as its factorization.

1151897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358.

The product of its digits is 2520, while the sum is 32.

The square root of 1151897 is about 1073.2646458353. The cubic root of 1151897 is about 104.8265314118.

It can be divided in two parts, 1151 and 897, that added together give a 11-th power (2048 = 2¹¹).

The spelling of 1151897 in words is "one million, one hundred fifty-one thousand, eight hundred ninety-seven".