1313021304 has 48 divisors (see below), whose sum is σ = 4064115120. Its totient is φ = 375148800.

The previous prime is 1313021293. The next prime is 1313021321. The reversal of 1313021304 is 4031203131.

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

It is a congruent 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, 1302097 + ... + 1303104.

It is an arithmetic number, because the mean of its divisors is an integer number (84669065).

Almost surely, 2^1313021304 is an apocalyptic number.

1313021304 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1313021304 is an abundant number, since it is smaller than the sum of its proper divisors (2751093816).

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

1313021304 is a wasteful number, since it uses less digits than its factorization.

1313021304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2605220 (or 2605213 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 1313021304 is about 36235.6358299396. The cubic root of 1313021304 is about 1095.0247220289.

Adding to 1313021304 its reverse (4031203131), we get a palindrome (5344224435).

The spelling of 1313021304 in words is "one billion, three hundred thirteen million, twenty-one thousand, three hundred four".