1381620171 has 16 divisors (see below), whose sum is σ = 1874125088. Its totient is φ = 905126400.

The previous prime is 1381620161. The next prime is 1381620187. The reversal of 1381620171 is 1710261831.

It is not a de Polignac number, because 1381620171 - 2¹⁰ = 1381619147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1381620101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 234441 + ... + 240261.

It is an arithmetic number, because the mean of its divisors is an integer number (117132818).

Almost surely, 2^1381620171 is an apocalyptic number.

1381620171 is a deficient number, since it is larger than the sum of its proper divisors (492504917).

1381620171 is a wasteful number, since it uses less digits than its factorization.

1381620171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7182.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 1381620171 is about 37170.1516138958. The cubic root of 1381620171 is about 1113.7718104362.

The spelling of 1381620171 in words is "one billion, three hundred eighty-one million, six hundred twenty thousand, one hundred seventy-one".