1381106439 has 12 divisors (see below), whose sum is σ = 1995258096. Its totient is φ = 920586912.

The previous prime is 1381106423. The next prime is 1381106449. The reversal of 1381106439 is 9346011831.

1381106439 is a `hidden beast` number, since 1 + 3 + 8 + 1 + 1 + 0 + 643 + 9 = 666.

It is not a de Polignac number, because 1381106439 - 2⁴ = 1381106423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381106449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 87067 + ... + 101699.

It is an arithmetic number, because the mean of its divisors is an integer number (166271508).

Almost surely, 2^1381106439 is an apocalyptic number.

1381106439 is a deficient number, since it is larger than the sum of its proper divisors (614151657).

1381106439 is a wasteful number, since it uses less digits than its factorization.

1381106439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25126 (or 25123 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 1381106439 is about 37163.2404265290. The cubic root of 1381106439 is about 1113.6337476109.

The spelling of 1381106439 in words is "one billion, three hundred eighty-one million, one hundred six thousand, four hundred thirty-nine".