3985291 has 4 divisors (see below), whose sum is σ = 3990672. Its totient is φ = 3979912.

The previous prime is 3985277. The next prime is 3985297. The reversal of 3985291 is 1925893.

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-3985291 is a prime.

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 3985291.

It is not an unprimeable number, because it can be changed into a prime (3985297) 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, 1360 + ... + 3133.

It is an arithmetic number, because the mean of its divisors is an integer number (997668).

Almost surely, 2^3985291 is an apocalyptic number.

3985291 is a deficient number, since it is larger than the sum of its proper divisors (5381).

3985291 is an equidigital number, since it uses as much as digits as its factorization.

3985291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5380.

The product of its digits is 19440, while the sum is 37.

The square root of 3985291 is about 1996.3193632282. The cubic root of 3985291 is about 158.5452905233.

The spelling of 3985291 in words is "three million, nine hundred eighty-five thousand, two hundred ninety-one".