1321031 has 2 divisors, whose sum is σ = 1321032. Its totient is φ = 1321030.

The previous prime is 1321007. The next prime is 1321063. The reversal of 1321031 is 1301231.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321031 is a prime.

It is a super-2 number, since 2×1321031² = 3490245805922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1320031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660515 + 660516.

It is an arithmetic number, because the mean of its divisors is an integer number (660516).

2^1321031 is an apocalyptic number.

1321031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321031 is an equidigital number, since it uses as much as digits as its factorization.

1321031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18, while the sum is 11.

The square root of 1321031 is about 1149.3611268875. The cubic root of 1321031 is about 109.7246833918.

Adding to 1321031 its reverse (1301231), we get a palindrome (2622262).

The spelling of 1321031 in words is "one million, three hundred twenty-one thousand, thirty-one".