1345691 has 2 divisors, whose sum is σ = 1345692. Its totient is φ = 1345690.

The previous prime is 1345667. The next prime is 1345693. The reversal of 1345691 is 1965431.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1345691 - 2⁶ = 1345627 is a prime.

Together with 1345693, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 16.

It is not a weakly prime, because it can be changed into another prime (1345693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672845 + 672846.

It is an arithmetic number, because the mean of its divisors is an integer number (672846).

2^1345691 is an apocalyptic number.

1345691 is a deficient number, since it is larger than the sum of its proper divisors (1).

1345691 is an equidigital number, since it uses as much as digits as its factorization.

1345691 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 29.

The square root of 1345691 is about 1160.0392234748. The cubic root of 1345691 is about 110.4032308006.

The spelling of 1345691 in words is "one million, three hundred forty-five thousand, six hundred ninety-one".