3187985 has 4 divisors (see below), whose sum is σ = 3825588. Its totient is φ = 2550384.

The previous prime is 3187979. The next prime is 3188033. The reversal of 3187985 is 5897813.

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 1024144 + 2163841 = 1012^2 + 1471^2 .

It is a cyclic number.

It is not a de Polignac number, because 3187985 - 2⁴ = 3187969 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 318794 + ... + 318803.

It is an arithmetic number, because the mean of its divisors is an integer number (956397).

Almost surely, 2^3187985 is an apocalyptic number.

It is an amenable number.

3187985 is a deficient number, since it is larger than the sum of its proper divisors (637603).

3187985 is an equidigital number, since it uses as much as digits as its factorization.

3187985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637602.

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

The square root of 3187985 is about 1785.4929291375. The cubic root of 3187985 is about 147.1765968081.

The spelling of 3187985 in words is "three million, one hundred eighty-seven thousand, nine hundred eighty-five".