4090491 has 18 divisors (see below), whose sum is σ = 6240780. Its totient is φ = 2581416.

The previous prime is 4090451. The next prime is 4090507. The reversal of 4090491 is 1940904.

It is not a de Polignac number, because 4090491 - 2¹¹ = 4088443 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4090441) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2620 + ... + 3878.

It is an arithmetic number, because the mean of its divisors is an integer number (346710).

Almost surely, 2^4090491 is an apocalyptic number.

4090491 is a deficient number, since it is larger than the sum of its proper divisors (2150289).

4090491 is a wasteful number, since it uses less digits than its factorization.

4090491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1303 (or 1281 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 4090491 is about 2022.4962299100. The cubic root of 4090491 is about 159.9282360461.

The spelling of 4090491 in words is "four million, ninety thousand, four hundred ninety-one".