1285671 has 4 divisors (see below), whose sum is σ = 1714232. Its totient is φ = 857112.

The previous prime is 1285649. The next prime is 1285679. The reversal of 1285671 is 1765821.

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

It is not a de Polignac number, because 1285671 - 2⁶ = 1285607 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1285679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214276 + ... + 214281.

It is an arithmetic number, because the mean of its divisors is an integer number (428558).

2^1285671 is an apocalyptic number.

1285671 is a deficient number, since it is larger than the sum of its proper divisors (428561).

1285671 is an equidigital number, since it uses as much as digits as its factorization.

1285671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 428560.

The product of its digits is 3360, while the sum is 30.

The square root of 1285671 is about 1133.8743316611. The cubic root of 1285671 is about 108.7368170042.

The spelling of 1285671 in words is "one million, two hundred eighty-five thousand, six hundred seventy-one".