1381541081 has 2 divisors, whose sum is σ = 1381541082. Its totient is φ = 1381541080.

The previous prime is 1381541003. The next prime is 1381541099. The reversal of 1381541081 is 1801451831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 870781081 + 510760000 = 29509^2 + 22600^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1381541081 is a prime.

It is a super-2 number, since 2×1381541081² = 3817311516981297122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1381541981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690770540 + 690770541.

It is an arithmetic number, because the mean of its divisors is an integer number (690770541).

Almost surely, 2^1381541081 is an apocalyptic number.

It is an amenable number.

1381541081 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381541081 is an equidigital number, since it uses as much as digits as its factorization.

1381541081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 32.

The square root of 1381541081 is about 37169.0877073947. The cubic root of 1381541081 is about 1113.7505576358.

The spelling of 1381541081 in words is "one billion, three hundred eighty-one million, five hundred forty-one thousand, eighty-one".