10521630 has 128 divisors (see below), whose sum is σ = 33868800. Its totient is φ = 2270592.

The previous prime is 10521629. The next prime is 10521659. The reversal of 10521630 is 3612501.

10521630 is a `hidden beast` number, since 10 + 5 + 21 + 630 = 666.

It is a super-2 number, since 2×10521630² = 221409395713800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 35764 + ... + 36056.

It is an arithmetic number, because the mean of its divisors is an integer number (264600).

Almost surely, 2^10521630 is an apocalyptic number.

10521630 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 10521630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16934400).

10521630 is an abundant number, since it is smaller than the sum of its proper divisors (23347170).

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

10521630 is a wasteful number, since it uses less digits than its factorization.

10521630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335 (or 329 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 18.

The square root of 10521630 is about 3243.7062135773. The cubic root of 10521630 is about 219.1262173533.

The spelling of 10521630 in words is "ten million, five hundred twenty-one thousand, six hundred thirty".