6641257 has 8 divisors (see below), whose sum is σ = 7639616. Its totient is φ = 5655312.

The previous prime is 6641249. The next prime is 6641263. The reversal of 6641257 is 7521466.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6641257 - 2³ = 6641249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6641267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1923 + ... + 4120.

It is an arithmetic number, because the mean of its divisors is an integer number (954952).

Almost surely, 2^6641257 is an apocalyptic number.

It is an amenable number.

6641257 is a deficient number, since it is larger than the sum of its proper divisors (998359).

6641257 is a wasteful number, since it uses less digits than its factorization.

6641257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6207.

The product of its digits is 10080, while the sum is 31.

The square root of 6641257 is about 2577.0636391056. The cubic root of 6641257 is about 187.9677872226.

The spelling of 6641257 in words is "six million, six hundred forty-one thousand, two hundred fifty-seven".