6458987 has 4 divisors (see below), whose sum is σ = 6609240. Its totient is φ = 6308736.

The previous prime is 6458981. The next prime is 6458989. The reversal of 6458987 is 7898546.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7898546 = 2 ⋅3949273.

It is a cyclic number.

It is not a de Polignac number, because 6458987 - 2⁶ = 6458923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6458981) 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, 75062 + ... + 75147.

It is an arithmetic number, because the mean of its divisors is an integer number (1652310).

Almost surely, 2^6458987 is an apocalyptic number.

6458987 is a deficient number, since it is larger than the sum of its proper divisors (150253).

6458987 is a wasteful number, since it uses less digits than its factorization.

6458987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150252.

The product of its digits is 483840, while the sum is 47.

The square root of 6458987 is about 2541.4537178552. The cubic root of 6458987 is about 186.2322127662.

The spelling of 6458987 in words is "six million, four hundred fifty-eight thousand, nine hundred eighty-seven".