6457139 has 4 divisors (see below), whose sum is σ = 6953856. Its totient is φ = 5960424.

The previous prime is 6457123. The next prime is 6457163. The reversal of 6457139 is 9317546.

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 6457139 - 2⁴ = 6457123 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6457099 and 6457108.

It is not an unprimeable number, because it can be changed into a prime (6457109) 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 in 3 ways as a sum of consecutive naturals, for example, 248339 + ... + 248364.

It is an arithmetic number, because the mean of its divisors is an integer number (1738464).

Almost surely, 2^6457139 is an apocalyptic number.

6457139 is a deficient number, since it is larger than the sum of its proper divisors (496717).

6457139 is a wasteful number, since it uses less digits than its factorization.

6457139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496716.

The product of its digits is 22680, while the sum is 35.

The square root of 6457139 is about 2541.0901204011. The cubic root of 6457139 is about 186.2144499210.

The spelling of 6457139 in words is "six million, four hundred fifty-seven thousand, one hundred thirty-nine".