1311225204 has 24 divisors (see below), whose sum is σ = 3111383520. Its totient is φ = 429666784.

The previous prime is 1311225191. The next prime is 1311225217. The reversal of 1311225204 is 4025221131.

It is an interprime number because it is at equal distance from previous prime (1311225191) and next prime (1311225217).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 925299 + ... + 926714.

It is an arithmetic number, because the mean of its divisors is an integer number (129640980).

Almost surely, 2^1311225204 is an apocalyptic number.

It is an amenable number.

1311225204 is an abundant number, since it is smaller than the sum of its proper divisors (1800158316).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311225204 is a wasteful number, since it uses less digits than its factorization.

1311225204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1852079 (or 1852077 counting only the distinct ones).

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

The square root of 1311225204 is about 36210.8437349919. The cubic root of 1311225204 is about 1094.5251943691.

Adding to 1311225204 its reverse (4025221131), we get a palindrome (5336446335).

The spelling of 1311225204 in words is "one billion, three hundred eleven million, two hundred twenty-five thousand, two hundred four".