1405511 has 2 divisors, whose sum is σ = 1405512. Its totient is φ = 1405510.

The previous prime is 1405493. The next prime is 1405513. The reversal of 1405511 is 1155041.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1405511 is a prime.

It is a super-2 number, since 2×1405511² = 3950922342242, which contains 22 as substring.

Together with 1405513, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1405511.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1405513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 702755 + 702756.

It is an arithmetic number, because the mean of its divisors is an integer number (702756).

2^1405511 is an apocalyptic number.

1405511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1405511 is an equidigital number, since it uses as much as digits as its factorization.

1405511 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100, while the sum is 17.

The square root of 1405511 is about 1185.5424918576. The cubic root of 1405511 is about 112.0154899919.

The spelling of 1405511 in words is "one million, four hundred five thousand, five hundred eleven".