3247645 has 4 divisors (see below), whose sum is σ = 3897180. Its totient is φ = 2598112.

The previous prime is 3247639. The next prime is 3247667. The reversal of 3247645 is 5467423.

3247645 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5467423 = 13 ⋅420571.

It can be written as a sum of positive squares in 2 ways, for example, as 1205604 + 2042041 = 1098^2 + 1429^2 .

It is a cyclic number.

It is not a de Polignac number, because 3247645 - 2⁹ = 3247133 is a prime.

It is an Ulam number.

It is a d-powerful number, because it can be written as 3⁹ + 2²¹ + 4⁶ + 7 + 6 + 4¹⁰ + 5⁷ .

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 324760 + ... + 324769.

It is an arithmetic number, because the mean of its divisors is an integer number (974295).

Almost surely, 2^3247645 is an apocalyptic number.

It is an amenable number.

3247645 is a deficient number, since it is larger than the sum of its proper divisors (649535).

3247645 is an equidigital number, since it uses as much as digits as its factorization.

3247645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649534.

The product of its digits is 20160, while the sum is 31.

The square root of 3247645 is about 1802.1223598857. The cubic root of 3247645 is about 148.0890169380.

The spelling of 3247645 in words is "three million, two hundred forty-seven thousand, six hundred forty-five".