3257861 has 2 divisors, whose sum is σ = 3257862. Its totient is φ = 3257860.

The previous prime is 3257851. The next prime is 3257869. The reversal of 3257861 is 1687523.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2608225 + 649636 = 1615^2 + 806^2 .

It is a cyclic number.

It is not a de Polignac number, because 3257861 - 2¹⁴ = 3241477 is a prime.

It is a super-2 number, since 2×3257861² = 21227316590642, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3257869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1628930 + 1628931.

It is an arithmetic number, because the mean of its divisors is an integer number (1628931).

Almost surely, 2^3257861 is an apocalyptic number.

It is an amenable number.

3257861 is a deficient number, since it is larger than the sum of its proper divisors (1).

3257861 is an equidigital number, since it uses as much as digits as its factorization.

3257861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10080, while the sum is 32.

The square root of 3257861 is about 1804.9545700654. The cubic root of 3257861 is about 148.2441338334.

The spelling of 3257861 in words is "three million, two hundred fifty-seven thousand, eight hundred sixty-one".