13042409 has 2 divisors, whose sum is σ = 13042410. Its totient is φ = 13042408.

The previous prime is 13042339. The next prime is 13042423. The reversal of 13042409 is 90424031.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9784384 + 3258025 = 3128^2 + 1805^2 .

It is an emirp because it is prime and its reverse (90424031) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13042409 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (13042429) 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, 6521204 + 6521205.

It is an arithmetic number, because the mean of its divisors is an integer number (6521205).

Almost surely, 2^13042409 is an apocalyptic number.

It is an amenable number.

13042409 is a deficient number, since it is larger than the sum of its proper divisors (1).

13042409 is an equidigital number, since it uses as much as digits as its factorization.

13042409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 13042409 is about 3611.4275570749. The cubic root of 13042409 is about 235.3888777843.

The spelling of 13042409 in words is "thirteen million, forty-two thousand, four hundred nine".