1331897 has 4 divisors (see below), whose sum is σ = 1522176. Its totient is φ = 1141620.

The previous prime is 1331857. The next prime is 1331921. The reversal of 1331897 is 7981331.

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.

It is a cyclic number.

It is not a de Polignac number, because 1331897 - 2⁸ = 1331641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1331857) 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, 95129 + ... + 95142.

It is an arithmetic number, because the mean of its divisors is an integer number (380544).

2^1331897 is an apocalyptic number.

It is an amenable number.

1331897 is a deficient number, since it is larger than the sum of its proper divisors (190279).

1331897 is an equidigital number, since it uses as much as digits as its factorization.

1331897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 190278.

The product of its digits is 4536, while the sum is 32.

The square root of 1331897 is about 1154.0784202124. The cubic root of 1331897 is about 110.0247051948.

The spelling of 1331897 in words is "one million, three hundred thirty-one thousand, eight hundred ninety-seven".