4392491 has 4 divisors (see below), whose sum is σ = 4467000. Its totient is φ = 4317984.

The previous prime is 4392473. The next prime is 4392497. The reversal of 4392491 is 1942934.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4392491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4392497) 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, 37166 + ... + 37283.

It is an arithmetic number, because the mean of its divisors is an integer number (1116750).

Almost surely, 2^4392491 is an apocalyptic number.

4392491 is a deficient number, since it is larger than the sum of its proper divisors (74509).

4392491 is an equidigital number, since it uses as much as digits as its factorization.

4392491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74508.

The product of its digits is 7776, while the sum is 32.

The square root of 4392491 is about 2095.8270443908. The cubic root of 4392491 is about 163.7709846269.

The spelling of 4392491 in words is "four million, three hundred ninety-two thousand, four hundred ninety-one".