1428671 has 2 divisors, whose sum is σ = 1428672. Its totient is φ = 1428670.

The previous prime is 1428649. The next prime is 1428673. The reversal of 1428671 is 1768241.

It is a strong prime.

It is an emirp because it is prime and its reverse (1768241) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1428671 - 2¹⁴ = 1412287 is a prime.

It is a super-2 number, since 2×1428671² = 4082201652482, which contains 22 as substring.

Together with 1428673, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1428673) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 714335 + 714336.

It is an arithmetic number, because the mean of its divisors is an integer number (714336).

2^1428671 is an apocalyptic number.

1428671 is a deficient number, since it is larger than the sum of its proper divisors (1).

1428671 is an equidigital number, since it uses as much as digits as its factorization.

1428671 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2688, while the sum is 29.

The square root of 1428671 is about 1195.2702623256. The cubic root of 1428671 is about 112.6274046328.

The spelling of 1428671 in words is "one million, four hundred twenty-eight thousand, six hundred seventy-one".