4090549 has 4 divisors (see below), whose sum is σ = 4097836. Its totient is φ = 4083264.

The previous prime is 4090531. The next prime is 4090553. The reversal of 4090549 is 9450904.

It is a happy number.

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 62500 + 4028049 = 250^2 + 2007^2 .

It is a cyclic number.

It is not a de Polignac number, because 4090549 - 2¹³ = 4082357 is a prime.

It is a super-2 number, since 2×4090549² = 33465182242802, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4090549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4090519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2724 + ... + 3949.

It is an arithmetic number, because the mean of its divisors is an integer number (1024459).

Almost surely, 2^4090549 is an apocalyptic number.

It is an amenable number.

4090549 is a deficient number, since it is larger than the sum of its proper divisors (7287).

4090549 is an equidigital number, since it uses as much as digits as its factorization.

4090549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7286.

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 4090549 is about 2022.5105685756. The cubic root of 4090549 is about 159.9289919287.

The spelling of 4090549 in words is "four million, ninety thousand, five hundred forty-nine".