1671287 has 6 divisors (see below), whose sum is σ = 1775688. Its totient is φ = 1572704.

The previous prime is 1671277. The next prime is 1671289. The reversal of 1671287 is 7821761.

It is not a de Polignac number, because 1671287 - 2⁶ = 1671223 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1671289) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2603 + ... + 3180.

It is an arithmetic number, because the mean of its divisors is an integer number (295948).

2^1671287 is an apocalyptic number.

1671287 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

1671287 is a deficient number, since it is larger than the sum of its proper divisors (104401).

1671287 is an equidigital number, since it uses as much as digits as its factorization.

1671287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5817 (or 5800 counting only the distinct ones).

The product of its digits is 4704, while the sum is 32.

The square root of 1671287 is about 1292.7826576807. The cubic root of 1671287 is about 118.6725692823.

The spelling of 1671287 in words is "one million, six hundred seventy-one thousand, two hundred eighty-seven".