6256409 has 2 divisors, whose sum is σ = 6256410. Its totient is φ = 6256408.

The previous prime is 6256381. The next prime is 6256421. The reversal of 6256409 is 9046526.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5929225 + 327184 = 2435^2 + 572^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6256409 is a prime.

It is not a weakly prime, because it can be changed into another prime (6256469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3128204 + 3128205.

It is an arithmetic number, because the mean of its divisors is an integer number (3128205).

Almost surely, 2^6256409 is an apocalyptic number.

It is an amenable number.

6256409 is a deficient number, since it is larger than the sum of its proper divisors (1).

6256409 is an equidigital number, since it uses as much as digits as its factorization.

6256409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 6256409 is about 2501.2814715661. The cubic root of 6256409 is about 184.2645159772.

The spelling of 6256409 in words is "six million, two hundred fifty-six thousand, four hundred nine".