6438129 has 4 divisors (see below), whose sum is σ = 8584176. Its totient is φ = 4292084.

The previous prime is 6438109. The next prime is 6438143. The reversal of 6438129 is 9218346.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6438129 - 2¹² = 6434033 is a prime.

It is a D-number.

It is a plaindrome in base 13.

It is a self number, because there is not a number n which added to its sum of digits gives 6438129.

It is not an unprimeable number, because it can be changed into a prime (6438109) 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, 1073019 + ... + 1073024.

It is an arithmetic number, because the mean of its divisors is an integer number (2146044).

Almost surely, 2^6438129 is an apocalyptic number.

It is an amenable number.

6438129 is a deficient number, since it is larger than the sum of its proper divisors (2146047).

6438129 is a wasteful number, since it uses less digits than its factorization.

6438129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2146046.

The product of its digits is 10368, while the sum is 33.

The square root of 6438129 is about 2537.3468426685. The cubic root of 6438129 is about 186.0315300924.

The spelling of 6438129 in words is "six million, four hundred thirty-eight thousand, one hundred twenty-nine".