6491057 has 4 divisors (see below), whose sum is σ = 6502260. Its totient is φ = 6479856.

The previous prime is 6491047. The next prime is 6491081. The reversal of 6491057 is 7501946.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 295936 + 6195121 = 544^2 + 2489^2 .

It is a cyclic number.

It is not a de Polignac number, because 6491057 - 2⁸ = 6490801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6491047) 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, 4682 + ... + 5907.

It is an arithmetic number, because the mean of its divisors is an integer number (1625565).

Almost surely, 2^6491057 is an apocalyptic number.

It is an amenable number.

6491057 is a deficient number, since it is larger than the sum of its proper divisors (11203).

6491057 is a wasteful number, since it uses less digits than its factorization.

6491057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11202.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 6491057 is about 2547.7552865218. The cubic root of 6491057 is about 186.5399292062.

The spelling of 6491057 in words is "six million, four hundred ninety-one thousand, fifty-seven".