3996247 has 4 divisors (see below), whose sum is σ = 4064040. Its totient is φ = 3928456.

The previous prime is 3996221. The next prime is 3996277. The reversal of 3996247 is 7426993.

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

It is not a de Polignac number, because 3996247 - 2¹⁹ = 3471959 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3996277) 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, 33808 + ... + 33925.

It is an arithmetic number, because the mean of its divisors is an integer number (1016010).

Almost surely, 2^3996247 is an apocalyptic number.

3996247 is a deficient number, since it is larger than the sum of its proper divisors (67793).

3996247 is an equidigital number, since it uses as much as digits as its factorization.

3996247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67792.

The product of its digits is 81648, while the sum is 40.

The square root of 3996247 is about 1999.0615298184. The cubic root of 3996247 is about 158.6904436940.

The spelling of 3996247 in words is "three million, nine hundred ninety-six thousand, two hundred forty-seven".