3981147 has 8 divisors (see below), whose sum is σ = 5322240. Its totient is φ = 2647080.

The previous prime is 3981137. The next prime is 3981157. The reversal of 3981147 is 7411893.

It is an interprime number because it is at equal distance from previous prime (3981137) and next prime (3981157).

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

It is not a de Polignac number, because 3981147 - 2⁸ = 3980891 is a prime.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (3981137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 247 + ... + 2832.

It is an arithmetic number, because the mean of its divisors is an integer number (665280).

Almost surely, 2^3981147 is an apocalyptic number.

3981147 is a deficient number, since it is larger than the sum of its proper divisors (1341093).

3981147 is a wasteful number, since it uses less digits than its factorization.

3981147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3513.

The product of its digits is 6048, while the sum is 33.

The square root of 3981147 is about 1995.2811831920. The cubic root of 3981147 is about 158.4903184154.

The spelling of 3981147 in words is "three million, nine hundred eighty-one thousand, one hundred forty-seven".