6434857 has 16 divisors (see below), whose sum is σ = 8007552. Its totient is φ = 5080320.

The previous prime is 6434849. The next prime is 6434861. The reversal of 6434857 is 7584346.

It is a Cunningham number, because it is equal to 186³+1.

It is a cyclic number.

It is not a de Polignac number, because 6434857 - 2³ = 6434849 is a prime.

It is a super-2 number, since 2×6434857² = 82814769220898, which contains 22 as substring.

It is a d-powerful number, because it can be written as 6⁶ + 4⁷ + 3⁷ + 4¹¹ + 8⁷ + 5⁷ + 7² .

It is a Duffinian number.

Its product of digits (80640) is a multiple of the sum of its prime divisors (2688).

It is not an unprimeable number, because it can be changed into a prime (6434657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1108 + ... + 3754.

It is an arithmetic number, because the mean of its divisors is an integer number (500472).

Almost surely, 2^6434857 is an apocalyptic number.

It is an amenable number.

6434857 is a deficient number, since it is larger than the sum of its proper divisors (1572695).

6434857 is a wasteful number, since it uses less digits than its factorization.

6434857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2688.

The product of its digits is 80640, while the sum is 37.

The square root of 6434857 is about 2536.7019927457. The cubic root of 6434857 is about 186.0000096350. Note that the first 5 decimals are identical.

The spelling of 6434857 in words is "six million, four hundred thirty-four thousand, eight hundred fifty-seven".