6425539 has 4 divisors (see below), whose sum is σ = 6466624. Its totient is φ = 6384456.

The previous prime is 6425527. The next prime is 6425543. The reversal of 6425539 is 9355246.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9355246 = 2 ⋅4677623.

It is a cyclic number.

It is not a de Polignac number, because 6425539 - 2⁷ = 6425411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6425509) 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, 20307 + ... + 20620.

It is an arithmetic number, because the mean of its divisors is an integer number (1616656).

Almost surely, 2^6425539 is an apocalyptic number.

6425539 is a deficient number, since it is larger than the sum of its proper divisors (41085).

6425539 is a wasteful number, since it uses less digits than its factorization.

6425539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41084.

The product of its digits is 32400, while the sum is 34.

The square root of 6425539 is about 2534.8646906689. The cubic root of 6425539 is about 185.9101871093.

The spelling of 6425539 in words is "six million, four hundred twenty-five thousand, five hundred thirty-nine".