4249986 has 48 divisors (see below), whose sum is σ = 9662016. Its totient is φ = 1238688.

The previous prime is 4249981. The next prime is 4250021. The reversal of 4249986 is 6899424.

It is a d-powerful number, because it can be written as 4² + 2¹³ + 4¹¹ + 9² + 9³ + 8 + 6⁶ .

Its product of digits (124416) is a multiple of the sum of its prime divisors (144).

It is not an unprimeable number, because it can be changed into a prime (4249981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 41211 + ... + 41313.

It is an arithmetic number, because the mean of its divisors is an integer number (201292).

Almost surely, 2^4249986 is an apocalyptic number.

4249986 is a gapful number since it is divisible by the number (46) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 4249986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4831008).

4249986 is an abundant number, since it is smaller than the sum of its proper divisors (5412030).

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

4249986 is a wasteful number, since it uses less digits than its factorization.

4249986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 144 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 4249986 is about 2061.5494173073. The cubic root of 4249986 is about 161.9804122026.

The spelling of 4249986 in words is "four million, two hundred forty-nine thousand, nine hundred eighty-six".