1205212245 has 16 divisors (see below), whose sum is σ = 1932216000. Its totient is φ = 641487744.

The previous prime is 1205212243. The next prime is 1205212249. The reversal of 1205212245 is 5422125021.

It is not a de Polignac number, because 1205212245 - 2¹ = 1205212243 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205212243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 73024 + ... + 87993.

It is an arithmetic number, because the mean of its divisors is an integer number (120763500).

Almost surely, 2^1205212245 is an apocalyptic number.

1205212245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1205212245 is a deficient number, since it is larger than the sum of its proper divisors (727003755).

1205212245 is a wasteful number, since it uses less digits than its factorization.

1205212245 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161524.

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 1205212245 is about 34716.1669111093. The cubic root of 1205212245 is about 1064.1949127181.

Adding to 1205212245 its reverse (5422125021), we get a palindrome (6627337266).

The spelling of 1205212245 in words is "one billion, two hundred five million, two hundred twelve thousand, two hundred forty-five".