10457521 has 4 divisors (see below), whose sum is σ = 10464100. Its totient is φ = 10450944.

The previous prime is 10457507. The next prime is 10457527. The reversal of 10457521 is 12575401.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 12575401 = 313 ⋅40177.

It can be written as a sum of positive squares in 2 ways, for example, as 3381921 + 7075600 = 1839^2 + 2660^2 .

It is a cyclic number.

It is not a de Polignac number, because 10457521 - 2⁷ = 10457393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10457527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 745 + ... + 4633.

It is an arithmetic number, because the mean of its divisors is an integer number (2616025).

Almost surely, 2^10457521 is an apocalyptic number.

It is an amenable number.

10457521 is a deficient number, since it is larger than the sum of its proper divisors (6579).

10457521 is an equidigital number, since it uses as much as digits as its factorization.

10457521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6578.

The product of its (nonzero) digits is 1400, while the sum is 25.

The square root of 10457521 is about 3233.8090543506. The cubic root of 10457521 is about 218.6802601087.

The spelling of 10457521 in words is "ten million, four hundred fifty-seven thousand, five hundred twenty-one".