1321351 has 2 divisors, whose sum is σ = 1321352. Its totient is φ = 1321350.

The previous prime is 1321349. The next prime is 1321357. The reversal of 1321351 is 1531231.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1321351 - 2¹ = 1321349 is a prime.

Together with 1321349, it forms a pair of twin primes.

It is the 1150-th Hogben number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321357) by changing a digit.

It is a nontrivial repunit in base 1149.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660675 + 660676.

It is an arithmetic number, because the mean of its divisors is an integer number (660676).

2^1321351 is an apocalyptic number.

1321351 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321351 is an equidigital number, since it uses as much as digits as its factorization.

1321351 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90, while the sum is 16.

The square root of 1321351 is about 1149.5003262287. The cubic root of 1321351 is about 109.7335423976.

Adding to 1321351 its reverse (1531231), we get a palindrome (2852582).

The spelling of 1321351 in words is "one million, three hundred twenty-one thousand, three hundred fifty-one".