1345811 has 2 divisors, whose sum is σ = 1345812.
Its totient is φ = 1345810.
The previous prime is 1345787. The next prime is 1345859. The reversal of 1345811 is 1185431.
It is a weak prime.
It is a cyclic number.
It is a de Polignac number, because none of the positive numbers 2k-1345811 is a prime.
It is a super-2 number, since 2×13458112 = 3622414495442, which contains 22 as substring.
It is a Chen prime.
It is not a weakly prime, because it can be changed into another prime (1345711) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 672905 + 672906.
It is an arithmetic number, because the mean of its divisors is an integer number (672906).
21345811 is an apocalyptic number.
1345811 is a deficient number, since it is larger than the sum of its proper divisors (1).
1345811 is an equidigital number, since it uses as much as digits as its factorization.
1345811 is an evil number, because the sum of its binary digits is even.
The product of its digits is 480, while the sum is 23.
The square root of 1345811 is about 1160.0909447108.
The cubic root of 1345811 is about 110.4065123845.
The spelling of 1345811 in words is "one million, three hundred forty-five thousand, eight hundred eleven".