3247561 has 4 divisors (see below), whose sum is σ = 3438612. Its totient is φ = 3056512.

The previous prime is 3247547. The next prime is 3247567. The reversal of 3247561 is 1657423.

3247561 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: 1657423 = 1249 ⋅1327.

It can be written as a sum of positive squares in 2 ways, for example, as 3027600 + 219961 = 1740^2 + 469^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3247561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3247567) 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 in 3 ways as a sum of consecutive naturals, for example, 95500 + ... + 95533.

It is an arithmetic number, because the mean of its divisors is an integer number (859653).

Almost surely, 2^3247561 is an apocalyptic number.

It is an amenable number.

3247561 is a deficient number, since it is larger than the sum of its proper divisors (191051).

3247561 is a wasteful number, since it uses less digits than its factorization.

3247561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191050.

The product of its digits is 5040, while the sum is 28.

The square root of 3247561 is about 1802.0990538813. The cubic root of 3247561 is about 148.0877401580.

The spelling of 3247561 in words is "three million, two hundred forty-seven thousand, five hundred sixty-one".