3198521 has 4 divisors (see below), whose sum is σ = 3202944. Its totient is φ = 3194100.

The previous prime is 3198511. The next prime is 3198523. The reversal of 3198521 is 1258913.

3198521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 1258913 = 953 ⋅1321.

It is a cyclic number.

It is not a de Polignac number, because 3198521 - 2¹⁰ = 3197497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3198523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 845 + ... + 2666.

It is an arithmetic number, because the mean of its divisors is an integer number (800736).

Almost surely, 2^3198521 is an apocalyptic number.

It is an amenable number.

3198521 is a deficient number, since it is larger than the sum of its proper divisors (4423).

3198521 is an equidigital number, since it uses as much as digits as its factorization.

3198521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4422.

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

The square root of 3198521 is about 1788.4409411552. The cubic root of 3198521 is about 147.3385536029.

The spelling of 3198521 in words is "three million, one hundred ninety-eight thousand, five hundred twenty-one".