5457521 has 4 divisors (see below), whose sum is σ = 5507700. Its totient is φ = 5407344.

The previous prime is 5457497. The next prime is 5457523. The reversal of 5457521 is 1257545.

5457521 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 3857296 + 1600225 = 1964^2 + 1265^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5457521 is a prime.

It is a super-3 number, since 3×5457521³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5457523) 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, 24926 + ... + 25143.

It is an arithmetic number, because the mean of its divisors is an integer number (1376925).

Almost surely, 2^5457521 is an apocalyptic number.

It is an amenable number.

5457521 is a deficient number, since it is larger than the sum of its proper divisors (50179).

5457521 is a wasteful number, since it uses less digits than its factorization.

5457521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50178.

The product of its digits is 7000, while the sum is 29.

The square root of 5457521 is about 2336.1337718547. The cubic root of 5457521 is about 176.0618003528.

It can be divided in two parts, 54 and 57521, that added together give a palindrome (57575).

The spelling of 5457521 in words is "five million, four hundred fifty-seven thousand, five hundred twenty-one".