1406609 has 2 divisors, whose sum is σ = 1406610. Its totient is φ = 1406608.

The previous prime is 1406593. The next prime is 1406617. The reversal of 1406609 is 9066041.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1345600 + 61009 = 1160^2 + 247^2 .

It is an emirp because it is prime and its reverse (9066041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1406609 - 2⁴ = 1406593 is a prime.

It is not a weakly prime, because it can be changed into another prime (1406689) 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, 703304 + 703305.

It is an arithmetic number, because the mean of its divisors is an integer number (703305).

2^1406609 is an apocalyptic number.

It is an amenable number.

1406609 is a deficient number, since it is larger than the sum of its proper divisors (1).

1406609 is an equidigital number, since it uses as much as digits as its factorization.

1406609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 26.

The square root of 1406609 is about 1186.0054805944. The cubic root of 1406609 is about 112.0446516264.

The spelling of 1406609 in words is "one million, four hundred six thousand, six hundred nine".