1381860371 has 16 divisors (see below), whose sum is σ = 1441456128. Its totient is φ = 1323285600.

The previous prime is 1381860229. The next prime is 1381860397. The reversal of 1381860371 is 1730681831.

It is a cyclic number.

It is not a de Polignac number, because 1381860371 - 2¹⁴ = 1381843987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1381860871) 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 15 ways as a sum of consecutive naturals, for example, 1516406 + ... + 1517316.

It is an arithmetic number, because the mean of its divisors is an integer number (90091008).

Almost surely, 2^1381860371 is an apocalyptic number.

1381860371 is a deficient number, since it is larger than the sum of its proper divisors (59595757).

1381860371 is a wasteful number, since it uses less digits than its factorization.

1381860371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1402.

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 1381860371 is about 37173.3825606441. The cubic root of 1381860371 is about 1113.8363512057.

The spelling of 1381860371 in words is "one billion, three hundred eighty-one million, eight hundred sixty thousand, three hundred seventy-one".