10521000 has 192 divisors, whose sum is σ = 40884480. Its totient is φ = 2390400.

The previous prime is 10520981. The next prime is 10521001. The reversal of 10521000 is 12501.

It is a happy number.

It is a super-2 number, since 2×10521000² = 221382882000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a nialpdrome in base 15.

It is not an unprimeable number, because it can be changed into a prime (10521001) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 62917 + ... + 63083.

It is an arithmetic number, because the mean of its divisors is an integer number (212940).

Almost surely, 2^10521000 is an apocalyptic number.

10521000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10521000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20442240).

10521000 is an abundant number, since it is smaller than the sum of its proper divisors (30363480).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10521000 is a wasteful number, since it uses less digits than its factorization.

10521000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 184 counting only the distinct ones).

The product of its (nonzero) digits is 10, while the sum is 9.

The square root of 10521000 is about 3243.6091009861. The cubic root of 10521000 is about 219.1218437511.

Adding to 10521000 its reverse (12501), we get a palindrome (10533501).

The spelling of 10521000 in words is "ten million, five hundred twenty-one thousand".