1387671 has 4 divisors (see below), whose sum is σ = 1850232. Its totient is φ = 925112.

The previous prime is 1387669. The next prime is 1387681. The reversal of 1387671 is 1767831.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1387671 - 2¹ = 1387669 is a prime.

It is a D-number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231276 + ... + 231281.

It is an arithmetic number, because the mean of its divisors is an integer number (462558).

2^1387671 is an apocalyptic number.

1387671 is a deficient number, since it is larger than the sum of its proper divisors (462561).

1387671 is an equidigital number, since it uses as much as digits as its factorization.

1387671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462560.

The product of its digits is 7056, while the sum is 33.

The square root of 1387671 is about 1177.9944821603. The cubic root of 1387671 is about 111.5395370121.

The spelling of 1387671 in words is "one million, three hundred eighty-seven thousand, six hundred seventy-one".