3981247 has 4 divisors (see below), whose sum is σ = 4215456. Its totient is φ = 3747040.

The previous prime is 3981227. The next prime is 3981253. The reversal of 3981247 is 7421893.

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

It is a cyclic number.

It is not a de Polignac number, because 3981247 - 2⁷ = 3981119 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3981217) 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, 117079 + ... + 117112.

It is an arithmetic number, because the mean of its divisors is an integer number (1053864).

Almost surely, 2^3981247 is an apocalyptic number.

3981247 is a deficient number, since it is larger than the sum of its proper divisors (234209).

3981247 is a wasteful number, since it uses less digits than its factorization.

3981247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234208.

The product of its digits is 12096, while the sum is 34.

The square root of 3981247 is about 1995.3062421593. The cubic root of 3981247 is about 158.4916454114.

The spelling of 3981247 in words is "three million, nine hundred eighty-one thousand, two hundred forty-seven".