4090731 has 4 divisors (see below), whose sum is σ = 5454312. Its totient is φ = 2727152.

The previous prime is 4090703. The next prime is 4090733. The reversal of 4090731 is 1370904.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4090731 - 2¹³ = 4082539 is a prime.

It is a super-2 number, since 2×4090731² = 33468160228722, which contains 22 as substring.

It is a D-number.

4090731 is a lucky number.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (4090733) 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, 681786 + ... + 681791.

It is an arithmetic number, because the mean of its divisors is an integer number (1363578).

Almost surely, 2^4090731 is an apocalyptic number.

4090731 is a deficient number, since it is larger than the sum of its proper divisors (1363581).

4090731 is a wasteful number, since it uses less digits than its factorization.

4090731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1363580.

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 4090731 is about 2022.5555616596. Note that the first 4 decimals coincide. The cubic root of 4090731 is about 159.9313637901.

The spelling of 4090731 in words is "four million, ninety thousand, seven hundred thirty-one".