1381238727 has 16 divisors (see below), whose sum is σ = 2012491008. Its totient is φ = 835690880.

The previous prime is 1381238713. The next prime is 1381238741. The reversal of 1381238727 is 7278321831.

It is an interprime number because it is at equal distance from previous prime (1381238713) and next prime (1381238741).

It is a cyclic number.

It is not a de Polignac number, because 1381238727 - 2¹⁴ = 1381222343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381238707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15723 + ... + 54860.

It is an arithmetic number, because the mean of its divisors is an integer number (125780688).

Almost surely, 2^1381238727 is an apocalyptic number.

1381238727 is a deficient number, since it is larger than the sum of its proper divisors (631252281).

1381238727 is a wasteful number, since it uses less digits than its factorization.

1381238727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71190.

The product of its digits is 112896, while the sum is 42.

The square root of 1381238727 is about 37165.0202071787. The cubic root of 1381238727 is about 1113.6693026012.

The spelling of 1381238727 in words is "one billion, three hundred eighty-one million, two hundred thirty-eight thousand, seven hundred twenty-seven".