10521865 has 8 divisors (see below), whose sum is σ = 13033728. Its totient is φ = 8145840.

The previous prime is 10521859. The next prime is 10521869. The reversal of 10521865 is 56812501.

10521865 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 10521865 - 2¹⁹ = 9997577 is a prime.

It is a super-2 number, since 2×10521865² = 221419286156450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10521869) 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, 33787 + ... + 34096.

It is an arithmetic number, because the mean of its divisors is an integer number (1629216).

Almost surely, 2^10521865 is an apocalyptic number.

It is an amenable number.

10521865 is a deficient number, since it is larger than the sum of its proper divisors (2511863).

10521865 is an equidigital number, since it uses as much as digits as its factorization.

10521865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67919.

The product of its (nonzero) digits is 2400, while the sum is 28.

The square root of 10521865 is about 3243.7424373708. The cubic root of 10521865 is about 219.1278487316.

The spelling of 10521865 in words is "ten million, five hundred twenty-one thousand, eight hundred sixty-five".