3981315 has 32 divisors (see below), whose sum is σ = 7269696. Its totient is φ = 1843200.

The previous prime is 3981301. The next prime is 3981331. The reversal of 3981315 is 5131893.

3981315 = T₃₁₇ + T₃₁₈ + ... + T₃₈₁.

It is a happy number.

It is not a de Polignac number, because 3981315 - 2¹¹ = 3979267 is a prime.

It is a nialpdrome in base 13.

It is a zygodrome in base 2.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2715 + ... + 3915.

It is an arithmetic number, because the mean of its divisors is an integer number (227178).

Almost surely, 2^3981315 is an apocalyptic number.

3981315 is a deficient number, since it is larger than the sum of its proper divisors (3288381).

3981315 is a wasteful number, since it uses less digits than its factorization.

3981315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239.

The product of its digits is 3240, while the sum is 30.

The square root of 3981315 is about 1995.3232820774. The cubic root of 3981315 is about 158.4925477560.

The spelling of 3981315 in words is "three million, nine hundred eighty-one thousand, three hundred fifteen".