4320987 has 16 divisors (see below), whose sum is σ = 6559488. Its totient is φ = 2504480.

The previous prime is 4320959. The next prime is 4321003. The reversal of 4320987 is 7890234.

It is not a de Polignac number, because 4320987 - 2¹⁰ = 4319963 is a prime.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (4320917) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2088 + ... + 3605.

It is an arithmetic number, because the mean of its divisors is an integer number (409968).

Almost surely, 2^4320987 is an apocalyptic number.

4320987 is a deficient number, since it is larger than the sum of its proper divisors (2238501).

4320987 is a wasteful number, since it uses less digits than its factorization.

4320987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5730.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 4320987 is about 2078.6983908206. The cubic root of 4320987 is about 162.8774594317.

Adding to 4320987 its reverse (7890234), we get a palindrome (12211221).

The spelling of 4320987 in words is "four million, three hundred twenty thousand, nine hundred eighty-seven".