1381133505 has 16 divisors (see below), whose sum is σ = 2210310144. Its totient is φ = 736439040.

The previous prime is 1381133491. The next prime is 1381133531. The reversal of 1381133505 is 5053311831.

It is not a de Polignac number, because 1381133505 - 2⁵ = 1381133473 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90112 + ... + 104318.

It is an arithmetic number, because the mean of its divisors is an integer number (138144384).

Almost surely, 2^1381133505 is an apocalyptic number.

1381133505 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1381133505 is a deficient number, since it is larger than the sum of its proper divisors (829176639).

1381133505 is a wasteful number, since it uses less digits than its factorization.

1381133505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20696.

The product of its (nonzero) digits is 5400, while the sum is 30.

The square root of 1381133505 is about 37163.6045749063. The cubic root of 1381133505 is about 1113.6410223131.

The spelling of 1381133505 in words is "one billion, three hundred eighty-one million, one hundred thirty-three thousand, five hundred five".