1331047 has 4 divisors (see below), whose sum is σ = 1374016. Its totient is φ = 1288080.

The previous prime is 1331041. The next prime is 1331051. The reversal of 1331047 is 7401331.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1331047 - 2³ = 1331039 is a prime.

It is a super-2 number, since 2×1331047² = 3543372232418, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331041) 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, 21438 + ... + 21499.

It is an arithmetic number, because the mean of its divisors is an integer number (343504).

2^1331047 is an apocalyptic number.

1331047 is a deficient number, since it is larger than the sum of its proper divisors (42969).

1331047 is an equidigital number, since it uses as much as digits as its factorization.

1331047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42968.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 1331047 is about 1153.7101022354. The cubic root of 1331047 is about 110.0012947506.

Adding to 1331047 its reverse (7401331), we get a palindrome (8732378).

The spelling of 1331047 in words is "one million, three hundred thirty-one thousand, forty-seven".