3245598721 has 4 divisors (see below), whose sum is σ = 3253345200. Its totient is φ = 3237852244.

The previous prime is 3245598679. The next prime is 3245598731. The reversal of 3245598721 is 1278955423.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1278955423 = 3943 ⋅324361.

It is a cyclic number.

It is not a de Polignac number, because 3245598721 - 2⁷ = 3245598593 is a prime.

It is a super-2 number, since 2×3245598721² = 21067822115513671682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3245598731) 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, 3872611 + ... + 3873448.

It is an arithmetic number, because the mean of its divisors is an integer number (813336300).

Almost surely, 2^3245598721 is an apocalyptic number.

It is an amenable number.

3245598721 is a deficient number, since it is larger than the sum of its proper divisors (7746479).

3245598721 is an equidigital number, since it uses as much as digits as its factorization.

3245598721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7746478.

The product of its digits is 604800, while the sum is 46.

The square root of 3245598721 is about 56970.1564066661. The cubic root of 3245598721 is about 1480.5790771760.

The spelling of 3245598721 in words is "three billion, two hundred forty-five million, five hundred ninety-eight thousand, seven hundred twenty-one".