10215605 has 4 divisors (see below), whose sum is σ = 12258732. Its totient is φ = 8172480.

The previous prime is 10215599. The next prime is 10215607. The reversal of 10215605 is 50651201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50651201 = 1193 ⋅42457.

It can be written as a sum of positive squares in 2 ways, for example, as 3129361 + 7086244 = 1769^2 + 2662^2 .

It is not a de Polignac number, because 10215605 - 2⁸ = 10215349 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10215607) 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 3 ways as a sum of consecutive naturals, for example, 1021556 + ... + 1021565.

It is an arithmetic number, because the mean of its divisors is an integer number (3064683).

Almost surely, 2^10215605 is an apocalyptic number.

It is an amenable number.

10215605 is a deficient number, since it is larger than the sum of its proper divisors (2043127).

10215605 is an equidigital number, since it uses as much as digits as its factorization.

10215605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2043126.

The product of its (nonzero) digits is 300, while the sum is 20.

The square root of 10215605 is about 3196.1860083543. The cubic root of 10215605 is about 216.9808289321.

Adding to 10215605 its reverse (50651201), we get a palindrome (60866806).

The spelling of 10215605 in words is "ten million, two hundred fifteen thousand, six hundred five".