1312203204 has 54 divisors (see below), whose sum is σ = 3591752346. Its totient is φ = 403752960.

The previous prime is 1312203173. The next prime is 1312203209. The reversal of 1312203204 is 4023022131.

It can be written as a sum of positive squares in 3 ways, for example, as 12744900 + 1299458304 = 3570^2 + 36048^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (1312203209) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 101757 + ... + 113924.

Almost surely, 2^1312203204 is an apocalyptic number.

It is an amenable number.

1312203204 is an abundant number, since it is smaller than the sum of its proper divisors (2279549142).

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

1312203204 is a wasteful number, since it uses less digits than its factorization.

1312203204 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215717 (or 215699 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 1312203204 is about 36224.3454599252. The cubic root of 1312203204 is about 1094.7972502576.

Adding to 1312203204 its reverse (4023022131), we get a palindrome (5335225335).

The spelling of 1312203204 in words is "one billion, three hundred twelve million, two hundred three thousand, two hundred four".