10521287 has 8 divisors (see below), whose sum is σ = 12439200. Its totient is φ = 8707104.

The previous prime is 10521263. The next prime is 10521289. The reversal of 10521287 is 78212501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 10521287 - 2⁸ = 10521031 is a prime.

It is a super-2 number, since 2×10521287² = 221394960272738, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10521289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25712 + ... + 26117.

It is an arithmetic number, because the mean of its divisors is an integer number (1554900).

Almost surely, 2^10521287 is an apocalyptic number.

10521287 is a deficient number, since it is larger than the sum of its proper divisors (1917913).

10521287 is an equidigital number, since it uses as much as digits as its factorization.

10521287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51865.

The product of its (nonzero) digits is 1120, while the sum is 26.

The square root of 10521287 is about 3243.6533415271. The cubic root of 10521287 is about 219.1238361915.

Adding to 10521287 its reverse (78212501), we get a palindrome (88733788).

The spelling of 10521287 in words is "ten million, five hundred twenty-one thousand, two hundred eighty-seven".