1387271 has 2 divisors, whose sum is σ = 1387272. Its totient is φ = 1387270.

The previous prime is 1387261. The next prime is 1387289. The reversal of 1387271 is 1727831.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1387271 - 2⁶ = 1387207 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1387231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693635 + 693636.

It is an arithmetic number, because the mean of its divisors is an integer number (693636).

2^1387271 is an apocalyptic number.

1387271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387271 is an equidigital number, since it uses as much as digits as its factorization.

1387271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2352, while the sum is 29.

The square root of 1387271 is about 1177.8246898414. The cubic root of 1387271 is about 111.5288187889.

The spelling of 1387271 in words is "one million, three hundred eighty-seven thousand, two hundred seventy-one".