6455987 has 4 divisors (see below), whose sum is σ = 6466416. Its totient is φ = 6445560.

The previous prime is 6455963. The next prime is 6456001. The reversal of 6455987 is 7895546.

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

It is a cyclic number.

It is not a de Polignac number, because 6455987 - 2⁶ = 6455923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6455947) 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, 4223 + ... + 5544.

It is an arithmetic number, because the mean of its divisors is an integer number (1616604).

Almost surely, 2^6455987 is an apocalyptic number.

6455987 is a deficient number, since it is larger than the sum of its proper divisors (10429).

6455987 is an equidigital number, since it uses as much as digits as its factorization.

6455987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10428.

The product of its digits is 302400, while the sum is 44.

The square root of 6455987 is about 2540.8634359209. The cubic root of 6455987 is about 186.2033752637.

It can be divided in two parts, 64559 and 87, that added together give a palindrome (64646).

The spelling of 6455987 in words is "six million, four hundred fifty-five thousand, nine hundred eighty-seven".