6542986 has 4 divisors (see below), whose sum is σ = 9814482. Its totient is φ = 3271492.

The previous prime is 6542959. The next prime is 6542989. The reversal of 6542986 is 6892456.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 4124961 + 2418025 = 2031^2 + 1555^2 .

It is a d-powerful number, because it can be written as 6³ + 5⁷ + 4 + 2¹¹ + 9⁷ + 8 + 6⁸ .

It is not an unprimeable number, because it can be changed into a prime (6542989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1635745 + ... + 1635748.

Almost surely, 2^6542986 is an apocalyptic number.

6542986 is a deficient number, since it is larger than the sum of its proper divisors (3271496).

6542986 is a wasteful number, since it uses less digits than its factorization.

6542986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3271495.

The product of its digits is 103680, while the sum is 40.

The square root of 6542986 is about 2557.9261130846. The cubic root of 6542986 is about 187.0360535592.

The spelling of 6542986 in words is "six million, five hundred forty-two thousand, nine hundred eighty-six".