1311204225 has 12 divisors (see below), whose sum is σ = 2167857776. Its totient is φ = 699308880.

The previous prime is 1311204199. The next prime is 1311204233. The reversal of 1311204225 is 5224021131.

It is not a de Polignac number, because 1311204225 - 2⁶ = 1311204161 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8741287 + ... + 8741436.

Almost surely, 2^1311204225 is an apocalyptic number.

1311204225 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1311204225 is a deficient number, since it is larger than the sum of its proper divisors (856653551).

1311204225 is a wasteful number, since it uses less digits than its factorization.

1311204225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17482736 (or 17482731 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1311204225 is about 36210.5540554132. The cubic root of 1311204225 is about 1094.5193570382.

Adding to 1311204225 its reverse (5224021131), we get a palindrome (6535225356).

The spelling of 1311204225 in words is "one billion, three hundred eleven million, two hundred four thousand, two hundred twenty-five".