1147409 has 2 divisors, whose sum is σ = 1147410. Its totient is φ = 1147408.

The previous prime is 1147387. The next prime is 1147417. The reversal of 1147409 is 9047411.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 861184 + 286225 = 928^2 + 535^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1147409 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1147459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 573704 + 573705.

It is an arithmetic number, because the mean of its divisors is an integer number (573705).

2^1147409 is an apocalyptic number.

It is an amenable number.

1147409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1147409 is an equidigital number, since it uses as much as digits as its factorization.

1147409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 1147409 is about 1071.1717882767. The cubic root of 1147409 is about 104.6902131472.

The spelling of 1147409 in words is "one million, one hundred forty-seven thousand, four hundred nine".