6512138 has 4 divisors (see below), whose sum is σ = 9768210. Its totient is φ = 3256068.

The previous prime is 6512137. The next prime is 6512147. The reversal of 6512138 is 8312156.

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., 5031049 + 1481089 = 2243^2 + 1217^2 .

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (6512137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1628033 + ... + 1628036.

Almost surely, 2^6512138 is an apocalyptic number.

6512138 is a deficient number, since it is larger than the sum of its proper divisors (3256072).

6512138 is a wasteful number, since it uses less digits than its factorization.

6512138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3256071.

The product of its digits is 1440, while the sum is 26.

The square root of 6512138 is about 2551.8891041736. The cubic root of 6512138 is about 186.7416528380.

The spelling of 6512138 in words is "six million, five hundred twelve thousand, one hundred thirty-eight".