1381320132 has 72 divisors (see below), whose sum is σ = 3364964064. Its totient is φ = 440783616.

The previous prime is 1381320097. The next prime is 1381320133. The reversal of 1381320132 is 2310231831.

It is not an unprimeable number, because it can be changed into a prime (1381320133) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 1448968 + ... + 1449920.

It is an arithmetic number, because the mean of its divisors is an integer number (46735612).

Almost surely, 2^1381320132 is an apocalyptic number.

1381320132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1381320132 is an abundant number, since it is smaller than the sum of its proper divisors (1983643932).

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

1381320132 is a wasteful number, since it uses less digits than its factorization.

1381320132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1109 (or 1054 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 24.

The square root of 1381320132 is about 37166.1153740877. The cubic root of 1381320132 is about 1113.6911806605.

Adding to 1381320132 its reverse (2310231831), we get a palindrome (3691551963).

The spelling of 1381320132 in words is "one billion, three hundred eighty-one million, three hundred twenty thousand, one hundred thirty-two".