3251891 has 2 divisors, whose sum is σ = 3251892. Its totient is φ = 3251890.

The previous prime is 3251887. The next prime is 3251909. The reversal of 3251891 is 1981523.

It is a weak prime.

It is an emirp because it is prime and its reverse (1981523) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 3251891 - 2² = 3251887 is a prime.

It is not a weakly prime, because it can be changed into another prime (3251851) 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 as a sum of consecutive naturals, namely, 1625945 + 1625946.

It is an arithmetic number, because the mean of its divisors is an integer number (1625946).

Almost surely, 2^3251891 is an apocalyptic number.

3251891 is a deficient number, since it is larger than the sum of its proper divisors (1).

3251891 is an equidigital number, since it uses as much as digits as its factorization.

3251891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 29.

The square root of 3251891 is about 1803.3000304996. The cubic root of 3251891 is about 148.1535264660.

The spelling of 3251891 in words is "three million, two hundred fifty-one thousand, eight hundred ninety-one".