4291986 has 16 divisors (see below), whose sum is σ = 9036000. Its totient is φ = 1355328.

The previous prime is 4291979. The next prime is 4292009. The reversal of 4291986 is 6891924.

It is a super-2 number, since 2×4291986² = 36842287648392, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18711 + ... + 18938.

It is an arithmetic number, because the mean of its divisors is an integer number (564750).

Almost surely, 2^4291986 is an apocalyptic number.

4291986 is an abundant number, since it is smaller than the sum of its proper divisors (4744014).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4291986 is a wasteful number, since it uses less digits than its factorization.

4291986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37673.

The product of its digits is 31104, while the sum is 39.

The square root of 4291986 is about 2071.7108871655. The cubic root of 4291986 is about 162.5122483864.

It can be divided in two parts, 429 and 1986, that added together give a triangular number (2415 = T₆₉).

The spelling of 4291986 in words is "four million, two hundred ninety-one thousand, nine hundred eighty-six".