1387571 has 2 divisors, whose sum is σ = 1387572. Its totient is φ = 1387570.

The previous prime is 1387531. The next prime is 1387579. The reversal of 1387571 is 1757831.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1387571 - 2¹⁴ = 1371187 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1387579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 693785 + 693786.

It is an arithmetic number, because the mean of its divisors is an integer number (693786).

2^1387571 is an apocalyptic number.

1387571 is a deficient number, since it is larger than the sum of its proper divisors (1).

1387571 is an equidigital number, since it uses as much as digits as its factorization.

1387571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5880, while the sum is 32.

The square root of 1387571 is about 1177.9520363750. The cubic root of 1387571 is about 111.5368576494.

The spelling of 1387571 in words is "one million, three hundred eighty-seven thousand, five hundred seventy-one".