1205061215 has 8 divisors (see below), whose sum is σ = 1495938240. Its totient is φ = 930805792.

The previous prime is 1205061139. The next prime is 1205061223. The reversal of 1205061215 is 5121605021.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1205061215 - 2¹⁴ = 1205044831 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4155239 + ... + 4155528.

It is an arithmetic number, because the mean of its divisors is an integer number (186992280).

Almost surely, 2^1205061215 is an apocalyptic number.

1205061215 is a deficient number, since it is larger than the sum of its proper divisors (290877025).

1205061215 is an equidigital number, since it uses as much as digits as its factorization.

1205061215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8310801.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 1205061215 is about 34713.9916316174. The cubic root of 1205061215 is about 1064.1504580110.

Adding to 1205061215 its reverse (5121605021), we get a palindrome (6326666236).

The spelling of 1205061215 in words is "one billion, two hundred five million, sixty-one thousand, two hundred fifteen".