1435561 has 2 divisors, whose sum is σ = 1435562. Its totient is φ = 1435560.

The previous prime is 1435559. The next prime is 1435571. The reversal of 1435561 is 1655341.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1336336 + 99225 = 1156^2 + 315^2 .

It is a cyclic number.

It is not a de Polignac number, because 1435561 - 2¹ = 1435559 is a prime.

Together with 1435559, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1435501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 717780 + 717781.

It is an arithmetic number, because the mean of its divisors is an integer number (717781).

2^1435561 is an apocalyptic number.

It is an amenable number.

1435561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1435561 is an equidigital number, since it uses as much as digits as its factorization.

1435561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1800, while the sum is 25.

The square root of 1435561 is about 1198.1489890661. The cubic root of 1435561 is about 112.8081690595.

The spelling of 1435561 in words is "one million, four hundred thirty-five thousand, five hundred sixty-one".