4721986 has 8 divisors (see below), whose sum is σ = 7094844. Its totient is φ = 2357040.

The previous prime is 4721963. The next prime is 4721999. The reversal of 4721986 is 6891274.

It can be written as a sum of positive squares in 2 ways, for example, as 3783025 + 938961 = 1945^2 + 969^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145 + ... + 3076.

Almost surely, 2^4721986 is an apocalyptic number.

4721986 is a deficient number, since it is larger than the sum of its proper divisors (2372858).

4721986 is a wasteful number, since it uses less digits than its factorization.

4721986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3956.

The product of its digits is 24192, while the sum is 37.

The square root of 4721986 is about 2173.0131154689. The cubic root of 4721986 is about 167.7676540567.

The spelling of 4721986 in words is "four million, seven hundred twenty-one thousand, nine hundred eighty-six".