1205215 has 16 divisors (see below), whose sum is σ = 1671840. Its totient is φ = 824320.

The previous prime is 1205179. The next prime is 1205219. The reversal of 1205215 is 5125021.

It is not a de Polignac number, because 1205215 - 2¹⁵ = 1172447 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205219) 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, 291 + ... + 1579.

It is an arithmetic number, because the mean of its divisors is an integer number (104490).

2^1205215 is an apocalyptic number.

1205215 is a deficient number, since it is larger than the sum of its proper divisors (466625).

1205215 is a wasteful number, since it uses less digits than its factorization.

1205215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322.

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 1205215 is about 1097.8228454537. The cubic root of 1205215 is about 106.4195723600.

It can be divided in two parts, 120 and 5215, that added together give a palindrome (5335).

The spelling of 1205215 in words is "one million, two hundred five thousand, two hundred fifteen".