1381149571 has 2 divisors, whose sum is σ = 1381149572. Its totient is φ = 1381149570.

The previous prime is 1381149559. The next prime is 1381149587. The reversal of 1381149571 is 1759411831.

It is a weak prime.

It is an emirp because it is prime and its reverse (1759411831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1381149571 - 2⁹ = 1381149059 is a prime.

It is not a weakly prime, because it can be changed into another prime (1381149271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690574785 + 690574786.

It is an arithmetic number, because the mean of its divisors is an integer number (690574786).

Almost surely, 2^1381149571 is an apocalyptic number.

1381149571 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381149571 is an equidigital number, since it uses as much as digits as its factorization.

1381149571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 40.

The square root of 1381149571 is about 37163.8207266153. The cubic root of 1381149571 is about 1113.6453404299.

The spelling of 1381149571 in words is "one billion, three hundred eighty-one million, one hundred forty-nine thousand, five hundred seventy-one".