5756521 has 2 divisors, whose sum is σ = 5756522. Its totient is φ = 5756520.

The previous prime is 5756501. The next prime is 5756579. The reversal of 5756521 is 1256575.

It is the 980-th star number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3080025 + 2676496 = 1755^2 + 1636^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5756521 is a prime.

5756521 is a lucky number.

It is equal to p₃₉₇₂₄₆ and since 5756521 and 397246 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (5756501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2878260 + 2878261.

It is an arithmetic number, because the mean of its divisors is an integer number (2878261).

Almost surely, 2^5756521 is an apocalyptic number.

It is an amenable number.

5756521 is a deficient number, since it is larger than the sum of its proper divisors (1).

5756521 is an equidigital number, since it uses as much as digits as its factorization.

5756521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10500, while the sum is 31.

The square root of 5756521 is about 2399.2750988580. The cubic root of 5756521 is about 179.2200927626.

The spelling of 5756521 in words is "five million, seven hundred fifty-six thousand, five hundred twenty-one".