1381484161 has 4 divisors (see below), whose sum is σ = 1395162324. Its totient is φ = 1367806000.

The previous prime is 1381484149. The next prime is 1381484191. The reversal of 1381484161 is 1614841831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1614841831 = 859 ⋅1879909.

It can be written as a sum of positive squares in 2 ways, for example, as 671794561 + 709689600 = 25919^2 + 26640^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1381484161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1381484161.

It is not an unprimeable number, because it can be changed into a prime (1381484131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6838930 + ... + 6839131.

It is an arithmetic number, because the mean of its divisors is an integer number (348790581).

Almost surely, 2^1381484161 is an apocalyptic number.

It is an amenable number.

1381484161 is a deficient number, since it is larger than the sum of its proper divisors (13678163).

1381484161 is a wasteful number, since it uses less digits than its factorization.

1381484161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13678162.

The product of its digits is 18432, while the sum is 37.

The square root of 1381484161 is about 37168.3220094747. The cubic root of 1381484161 is about 1113.7352617817.

The spelling of 1381484161 in words is "one billion, three hundred eighty-one million, four hundred eighty-four thousand, one hundred sixty-one".