1311203004 has 12 divisors (see below), whose sum is σ = 3059473704. Its totient is φ = 437067664.

The previous prime is 1311202993. The next prime is 1311203009. The reversal of 1311203004 is 4003021131.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311203009) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54633447 + ... + 54633470.

It is an arithmetic number, because the mean of its divisors is an integer number (254956142).

Almost surely, 2^1311203004 is an apocalyptic number.

It is an amenable number.

1311203004 is an abundant number, since it is smaller than the sum of its proper divisors (1748270700).

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

1311203004 is a wasteful number, since it uses less digits than its factorization.

1311203004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109266924 (or 109266922 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1311203004 is about 36210.5371956838. The cubic root of 1311203004 is about 1094.5190172974.

Adding to 1311203004 its reverse (4003021131), we get a palindrome (5314224135).

The spelling of 1311203004 in words is "one billion, three hundred eleven million, two hundred three thousand, four".