1205312245 has 8 divisors (see below), whose sum is σ = 1467962784. Its totient is φ = 949857744.

The previous prime is 1205312233. The next prime is 1205312249. The reversal of 1205312245 is 5422135021.

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 1205312245 - 2¹⁹ = 1204787957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205312249) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1798639 + ... + 1799308.

It is an arithmetic number, because the mean of its divisors is an integer number (183495348).

Almost surely, 2^1205312245 is an apocalyptic number.

It is an amenable number.

1205312245 is a deficient number, since it is larger than the sum of its proper divisors (262650539).

1205312245 is an equidigital number, since it uses as much as digits as its factorization.

1205312245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3598019.

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 1205312245 is about 34717.6071324047. The cubic root of 1205312245 is about 1064.2243450300.

Adding to 1205312245 its reverse (5422135021), we get a palindrome (6627447266).

The spelling of 1205312245 in words is "one billion, two hundred five million, three hundred twelve thousand, two hundred forty-five".