1381181067 has 12 divisors (see below), whose sum is σ = 2280045040. Its totient is φ = 789246288.

The previous prime is 1381180993. The next prime is 1381181071. The reversal of 1381181067 is 7601811831.

It is a happy number.

It is not a de Polignac number, because 1381181067 - 2⁷ = 1381180939 is a prime.

It is a super-2 number, since 2×1381181067² = 3815322279678516978, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1381181267) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10961692 + ... + 10961817.

Almost surely, 2^1381181067 is an apocalyptic number.

1381181067 is a deficient number, since it is larger than the sum of its proper divisors (898863973).

1381181067 is a wasteful number, since it uses less digits than its factorization.

1381181067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21923522 (or 21923519 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 36.

The square root of 1381181067 is about 37164.2444696512. The cubic root of 1381181067 is about 1113.6538056263.

Adding to 1381181067 its reverse (7601811831), we get a palindrome (8982992898).

The spelling of 1381181067 in words is "one billion, three hundred eighty-one million, one hundred eighty-one thousand, sixty-seven".