1381189641 has 32 divisors (see below), whose sum is σ = 2055352320. Its totient is φ = 819168000.

The previous prime is 1381189631. The next prime is 1381189661. The reversal of 1381189641 is 1469811831.

It is not a de Polignac number, because 1381189641 - 2⁵ = 1381189609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1381189593 and 1381189602.

It is not an unprimeable number, because it can be changed into a prime (1381189631) 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 31 ways as a sum of consecutive naturals, for example, 1199416 + ... + 1200566.

It is an arithmetic number, because the mean of its divisors is an integer number (64229760).

Almost surely, 2^1381189641 is an apocalyptic number.

It is an amenable number.

1381189641 is a deficient number, since it is larger than the sum of its proper divisors (674162679).

1381189641 is a wasteful number, since it uses less digits than its factorization.

1381189641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2257.

The product of its digits is 41472, while the sum is 42.

The square root of 1381189641 is about 37164.3598222813. The cubic root of 1381189641 is about 1113.6561100425.

The spelling of 1381189641 in words is "one billion, three hundred eighty-one million, one hundred eighty-nine thousand, six hundred forty-one".