4090521 has 8 divisors (see below), whose sum is σ = 5467104. Its totient is φ = 2720480.

The previous prime is 4090519. The next prime is 4090531. The reversal of 4090521 is 1250904.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4090521 - 2¹ = 4090519 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4090511) 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 7 ways as a sum of consecutive naturals, for example, 85 + ... + 2861.

It is an arithmetic number, because the mean of its divisors is an integer number (683388).

Almost surely, 2^4090521 is an apocalyptic number.

It is an amenable number.

4090521 is a deficient number, since it is larger than the sum of its proper divisors (1376583).

4090521 is a wasteful number, since it uses less digits than its factorization.

4090521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3271.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 4090521 is about 2022.5036464738. The cubic root of 4090521 is about 159.9286270208.

The spelling of 4090521 in words is "four million, ninety thousand, five hundred twenty-one".