3405247 has 2 divisors, whose sum is σ = 3405248. Its totient is φ = 3405246.

The previous prime is 3405217. The next prime is 3405263. The reversal of 3405247 is 7425043.

It is a strong prime.

It is an emirp because it is prime and its reverse (7425043) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3405247 - 2¹¹ = 3403199 is a prime.

3405247 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3405217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1702623 + 1702624.

It is an arithmetic number, because the mean of its divisors is an integer number (1702624).

Almost surely, 2^3405247 is an apocalyptic number.

3405247 is a deficient number, since it is larger than the sum of its proper divisors (1).

3405247 is an equidigital number, since it uses as much as digits as its factorization.

3405247 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3360, while the sum is 25.

The square root of 3405247 is about 1845.3311355960. The cubic root of 3405247 is about 150.4467716830.

The spelling of 3405247 in words is "three million, four hundred five thousand, two hundred forty-seven".