4098521 has 4 divisors (see below), whose sum is σ = 4684032. Its totient is φ = 3513012.

The previous prime is 4098511. The next prime is 4098533. The reversal of 4098521 is 1258904.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4098521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4098511) 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, 292745 + ... + 292758.

It is an arithmetic number, because the mean of its divisors is an integer number (1171008).

Almost surely, 2^4098521 is an apocalyptic number.

It is an amenable number.

4098521 is a deficient number, since it is larger than the sum of its proper divisors (585511).

4098521 is an equidigital number, since it uses as much as digits as its factorization.

4098521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 585510.

The product of its (nonzero) digits is 2880, while the sum is 29.

The square root of 4098521 is about 2024.4804271714. The cubic root of 4098521 is about 160.0328187887.

The spelling of 4098521 in words is "four million, ninety-eight thousand, five hundred twenty-one".