4098581 has 4 divisors (see below), whose sum is σ = 4339692. Its totient is φ = 3857472.

The previous prime is 4098571. The next prime is 4098583. The reversal of 4098581 is 1858904.

4098581 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.

It can be written as a sum of positive squares in 2 ways, for example, as 2739025 + 1359556 = 1655^2 + 1166^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4098581 is a prime.

It is a super-2 number, since 2×4098581² = 33596732427122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4098583) 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, 120530 + ... + 120563.

It is an arithmetic number, because the mean of its divisors is an integer number (1084923).

Almost surely, 2^4098581 is an apocalyptic number.

It is an amenable number.

4098581 is a deficient number, since it is larger than the sum of its proper divisors (241111).

4098581 is a wasteful number, since it uses less digits than its factorization.

4098581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241110.

The product of its (nonzero) digits is 11520, while the sum is 35.

The square root of 4098581 is about 2024.4952457341. The cubic root of 4098581 is about 160.0335997145.

The spelling of 4098581 in words is "four million, ninety-eight thousand, five hundred eighty-one".