6459987 has 16 divisors (see below), whose sum is σ = 9047808. Its totient is φ = 4092000.

The previous prime is 6459979. The next prime is 6459991. The reversal of 6459987 is 7899546.

It is not a de Polignac number, because 6459987 - 2³ = 6459979 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6459907) 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, 17133 + ... + 17505.

It is an arithmetic number, because the mean of its divisors is an integer number (565488).

Almost surely, 2^6459987 is an apocalyptic number.

6459987 is a deficient number, since it is larger than the sum of its proper divisors (2587821).

6459987 is a wasteful number, since it uses less digits than its factorization.

6459987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 650.

The product of its digits is 544320, while the sum is 48.

The square root of 6459987 is about 2541.6504480357. The cubic root of 6459987 is about 186.2418232826.

The spelling of 6459987 in words is "six million, four hundred fifty-nine thousand, nine hundred eighty-seven".