10521247 has 4 divisors (see below), whose sum is σ = 11477736. Its totient is φ = 9564760.

The previous prime is 10521241. The next prime is 10521253. The reversal of 10521247 is 74212501.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (10521241) and next prime (10521253).

It is a cyclic number.

It is not a de Polignac number, because 10521247 - 2³ = 10521239 is a prime.

It is a super-4 number, since 4×10521247⁴ (a number of 29 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10521241) 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, 478228 + ... + 478249.

It is an arithmetic number, because the mean of its divisors is an integer number (2869434).

Almost surely, 2^10521247 is an apocalyptic number.

10521247 is a deficient number, since it is larger than the sum of its proper divisors (956489).

10521247 is an equidigital number, since it uses as much as digits as its factorization.

10521247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 956488.

The product of its (nonzero) digits is 560, while the sum is 22.

The square root of 10521247 is about 3243.6471756342. The cubic root of 10521247 is about 219.1235585016.

Adding to 10521247 its reverse (74212501), we get a palindrome (84733748).

The spelling of 10521247 in words is "ten million, five hundred twenty-one thousand, two hundred forty-seven".