3247861 has 4 divisors (see below), whose sum is σ = 3253932. Its totient is φ = 3241792.

The previous prime is 3247847. The next prime is 3247889. The reversal of 3247861 is 1687423.

3247861 is nontrivially palindromic in base 11.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2869636 + 378225 = 1694^2 + 615^2 .

It is a 3-Lehmer number, since φ(3247861) divides (3247861-1)³.

It is a cyclic number.

It is not a de Polignac number, because 3247861 - 2¹³ = 3239669 is a prime.

It is a Duffinian number.

3247861 is an undulating number in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3247831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2146 + ... + 3331.

It is an arithmetic number, because the mean of its divisors is an integer number (813483).

Almost surely, 2^3247861 is an apocalyptic number.

It is an amenable number.

3247861 is a deficient number, since it is larger than the sum of its proper divisors (6071).

3247861 is an equidigital number, since it uses as much as digits as its factorization.

3247861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6070.

The product of its digits is 8064, while the sum is 31.

The square root of 3247861 is about 1802.1822882272. The cubic root of 3247861 is about 148.0922999855.

The spelling of 3247861 in words is "three million, two hundred forty-seven thousand, eight hundred sixty-one".