10321506 has 80 divisors (see below), whose sum is σ = 25918200. Its totient is φ = 3066336.

The previous prime is 10321489. The next prime is 10321513. The reversal of 10321506 is 60512301.

It can be written as a sum of positive squares in 4 ways, for example, as 455625 + 9865881 = 675^2 + 3141^2 .

It is a super-2 number, since 2×10321506² = 213066972216072, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 355900 + ... + 355928.

Almost surely, 2^10321506 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 10321506, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12959100).

10321506 is an abundant number, since it is smaller than the sum of its proper divisors (15596694).

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

10321506 is an equidigital number, since it uses as much as digits as its factorization.

10321506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82 (or 47 counting only the distinct ones).

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

The square root of 10321506 is about 3212.7100709526. The cubic root of 10321506 is about 217.7280366947.

Adding to 10321506 its reverse (60512301), we get a palindrome (70833807).

It can be divided in two parts, 103 and 21506, that added together give a square (21609 = 147²).

The spelling of 10321506 in words is "ten million, three hundred twenty-one thousand, five hundred six".