1381021471 has 2 divisors, whose sum is σ = 1381021472. Its totient is φ = 1381021470.

The previous prime is 1381021429. The next prime is 1381021507. The reversal of 1381021471 is 1741201831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1381021471 - 2²¹ = 1378924319 is a prime.

It is a super-3 number, since 3×1381021471³ (a number of 28 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1381031471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 690510735 + 690510736.

It is an arithmetic number, because the mean of its divisors is an integer number (690510736).

Almost surely, 2^1381021471 is an apocalyptic number.

1381021471 is a deficient number, since it is larger than the sum of its proper divisors (1).

1381021471 is an equidigital number, since it uses as much as digits as its factorization.

1381021471 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 1381021471 is about 37162.0972362971. The cubic root of 1381021471 is about 1113.6109095998.

The spelling of 1381021471 in words is "one billion, three hundred eighty-one million, twenty-one thousand, four hundred seventy-one".