6520057 has 2 divisors, whose sum is σ = 6520058. Its totient is φ = 6520056.

The previous prime is 6519991. The next prime is 6520067. The reversal of 6520057 is 7500256.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 6007401 + 512656 = 2451^2 + 716^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6520057 is a prime.

It is a super-2 number, since 2×6520057² = 85022286566498, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6520067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3260028 + 3260029.

It is an arithmetic number, because the mean of its divisors is an integer number (3260029).

Almost surely, 2^6520057 is an apocalyptic number.

It is an amenable number.

6520057 is a deficient number, since it is larger than the sum of its proper divisors (1).

6520057 is an equidigital number, since it uses as much as digits as its factorization.

6520057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2100, while the sum is 25.

The square root of 6520057 is about 2553.4402283978. The cubic root of 6520057 is about 186.8173170886.

The spelling of 6520057 in words is "six million, five hundred twenty thousand, fifty-seven".