3215987 has 4 divisors (see below), whose sum is σ = 3276720. Its totient is φ = 3155256.

The previous prime is 3215983. The next prime is 3216007. The reversal of 3215987 is 7895123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7895123 = 17 ⋅464419.

It is a cyclic number.

It is not a de Polignac number, because 3215987 - 2² = 3215983 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3215983) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30287 + ... + 30392.

It is an arithmetic number, because the mean of its divisors is an integer number (819180).

Almost surely, 2^3215987 is an apocalyptic number.

3215987 is a deficient number, since it is larger than the sum of its proper divisors (60733).

3215987 is an equidigital number, since it uses as much as digits as its factorization.

3215987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60732.

The product of its digits is 15120, while the sum is 35.

The square root of 3215987 is about 1793.3173171528. The cubic root of 3215987 is about 147.6062549524.

The spelling of 3215987 in words is "three million, two hundred fifteen thousand, nine hundred eighty-seven".