10021605 has 16 divisors (see below), whose sum is σ = 17492544. Its totient is φ = 4858880.

The previous prime is 10021601. The next prime is 10021633. The reversal of 10021605 is 50612001.

It is not a de Polignac number, because 10021605 - 2² = 10021601 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10021601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30204 + ... + 30533.

It is an arithmetic number, because the mean of its divisors is an integer number (1093284).

Almost surely, 2^10021605 is an apocalyptic number.

10021605 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

10021605 is a deficient number, since it is larger than the sum of its proper divisors (7470939).

10021605 is a wasteful number, since it uses less digits than its factorization.

10021605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60756.

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 10021605 is about 3165.6918675070. The cubic root of 10021605 is about 215.5985126044.

Adding to 10021605 its reverse (50612001), we get a palindrome (60633606).

The spelling of 10021605 in words is "ten million, twenty-one thousand, six hundred five".