3587981 has 4 divisors (see below), whose sum is σ = 3601212. Its totient is φ = 3574752.

The previous prime is 3587957. The next prime is 3587989. The reversal of 3587981 is 1897853.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 469225 + 3118756 = 685^2 + 1766^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3587981 is a prime.

It is a super-3 number, since 3×3587981³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3587989) 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, 6200 + ... + 6753.

It is an arithmetic number, because the mean of its divisors is an integer number (900303).

Almost surely, 2^3587981 is an apocalyptic number.

It is an amenable number.

3587981 is a deficient number, since it is larger than the sum of its proper divisors (13231).

3587981 is a wasteful number, since it uses less digits than its factorization.

3587981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13230.

The product of its digits is 60480, while the sum is 41.

The square root of 3587981 is about 1894.1966634962. The cubic root of 3587981 is about 153.0911357016.

The spelling of 3587981 in words is "three million, five hundred eighty-seven thousand, nine hundred eighty-one".