6425857 has 4 divisors (see below), whose sum is σ = 6764080. Its totient is φ = 6087636.

The previous prime is 6425833. The next prime is 6425863. The reversal of 6425857 is 7585246.

It is a happy number.

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 6425857 - 2¹⁹ = 5901569 is a prime.

It is a d-powerful number, because it can be written as 6 + 4⁹ + 2¹³ + 5² + 8² + 5⁸ + 7⁸ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6425957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 169083 + ... + 169120.

It is an arithmetic number, because the mean of its divisors is an integer number (1691020).

Almost surely, 2^6425857 is an apocalyptic number.

It is an amenable number.

6425857 is a deficient number, since it is larger than the sum of its proper divisors (338223).

6425857 is a wasteful number, since it uses less digits than its factorization.

6425857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338222.

The product of its digits is 67200, while the sum is 37.

The square root of 6425857 is about 2534.9274151344. The cubic root of 6425857 is about 185.9132539578.

It can be divided in two parts, 64 and 25857, that added together give a square (25921 = 161²).

The spelling of 6425857 in words is "six million, four hundred twenty-five thousand, eight hundred fifty-seven".