3256458721 has 2 divisors, whose sum is σ = 3256458722. Its totient is φ = 3256458720.

The previous prime is 3256458707. The next prime is 3256458727. The reversal of 3256458721 is 1278546523.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3180960000 + 75498721 = 56400^2 + 8689^2 .

It is a cyclic number.

It is not a de Polignac number, because 3256458721 - 2⁷ = 3256458593 is a prime.

It is not a weakly prime, because it can be changed into another prime (3256458727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1628229360 + 1628229361.

It is an arithmetic number, because the mean of its divisors is an integer number (1628229361).

Almost surely, 2^3256458721 is an apocalyptic number.

It is an amenable number.

3256458721 is a deficient number, since it is larger than the sum of its proper divisors (1).

3256458721 is an equidigital number, since it uses as much as digits as its factorization.

3256458721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 403200, while the sum is 43.

The square root of 3256458721 is about 57065.3898698677. The cubic root of 3256458721 is about 1482.2286123881.

The spelling of 3256458721 in words is "three billion, two hundred fifty-six million, four hundred fifty-eight thousand, seven hundred twenty-one".