3981158 has 4 divisors (see below), whose sum is σ = 5971740. Its totient is φ = 1990578.

The previous prime is 3981157. The next prime is 3981161. The reversal of 3981158 is 8511893.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3981157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 995288 + ... + 995291.

It is an arithmetic number, because the mean of its divisors is an integer number (1492935).

Almost surely, 2^3981158 is an apocalyptic number.

3981158 is a deficient number, since it is larger than the sum of its proper divisors (1990582).

3981158 is a wasteful number, since it uses less digits than its factorization.

3981158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1990581.

The product of its digits is 8640, while the sum is 35.

The square root of 3981158 is about 1995.2839396938. The cubic root of 3981158 is about 158.4904643860.

The spelling of 3981158 in words is "three million, nine hundred eighty-one thousand, one hundred fifty-eight".