1313426205 has 256 divisors, whose sum is σ = 3212697600. Its totient is φ = 492687360.

The previous prime is 1313426203. The next prime is 1313426263. The reversal of 1313426205 is 5026243131.

1313426205 is a `hidden beast` number, since 1 + 3 + 1 + 34 + 2 + 620 + 5 = 666.

It is not a de Polignac number, because 1313426205 - 2¹ = 1313426203 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313426203) by changing a digit.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 3967890 + ... + 3968220.

It is an arithmetic number, because the mean of its divisors is an integer number (12549600).

Almost surely, 2^1313426205 is an apocalyptic number.

1313426205 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1313426205 is an abundant number, since it is smaller than the sum of its proper divisors (1899271395).

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

1313426205 is a wasteful number, since it uses less digits than its factorization.

1313426205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 401 (or 395 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 1313426205 is about 36241.2224545475. Note that the first 3 decimals coincide. The cubic root of 1313426205 is about 1095.1372693365.

Adding to 1313426205 its reverse (5026243131), we get a palindrome (6339669336).

The spelling of 1313426205 in words is "one billion, three hundred thirteen million, four hundred twenty-six thousand, two hundred five".