1381442371 has 2 divisors, whose sum is σ = 1381442372. Its totient is φ = 1381442370.

The previous prime is 1381442357. The next prime is 1381442383. The reversal of 1381442371 is 1732441831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1381442371 - 2¹¹ = 1381440323 is a prime.

It is not a weakly prime, because it can be changed into another prime (1381442311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690721185 + 690721186.

It is an arithmetic number, because the mean of its divisors is an integer number (690721186).

Almost surely, 2^1381442371 is an apocalyptic number.

1381442371 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381442371 is an equidigital number, since it uses as much as digits as its factorization.

1381442371 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 34.

The square root of 1381442371 is about 37167.7598329520. The cubic root of 1381442371 is about 1113.7240314766.

The spelling of 1381442371 in words is "one billion, three hundred eighty-one million, four hundred forty-two thousand, three hundred seventy-one".