3870981 has 12 divisors (see below), whose sum is σ = 5611008. Its totient is φ = 2571624.

The previous prime is 3870959. The next prime is 3870983. The reversal of 3870981 is 1890783.

It is not a de Polignac number, because 3870981 - 2⁹ = 3870469 is a prime.

It is a super-2 number, since 2×3870981² = 29968987804722, which contains 22 as substring.

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3870983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2886 + ... + 4008.

It is an arithmetic number, because the mean of its divisors is an integer number (467584).

Almost surely, 2^3870981 is an apocalyptic number.

It is an amenable number.

3870981 is a deficient number, since it is larger than the sum of its proper divisors (1740027).

3870981 is a wasteful number, since it uses less digits than its factorization.

3870981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1512 (or 1509 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 3870981 is about 1967.4808766542. The cubic root of 3870981 is about 157.0147118619.

It can be divided in two parts, 3870 and 981, that added together give a triangular number (4851 = T₉₈).

The spelling of 3870981 in words is "three million, eight hundred seventy thousand, nine hundred eighty-one".