1670287 has 2 divisors, whose sum is σ = 1670288. Its totient is φ = 1670286.

The previous prime is 1670281. The next prime is 1670303. The reversal of 1670287 is 7820761.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1670287 - 2¹⁹ = 1145999 is a prime.

It is a Chen prime.

1670287 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1670281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835143 + 835144.

It is an arithmetic number, because the mean of its divisors is an integer number (835144).

2^1670287 is an apocalyptic number.

1670287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1670287 is an equidigital number, since it uses as much as digits as its factorization.

1670287 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4704, while the sum is 31.

The square root of 1670287 is about 1292.3958371954. The cubic root of 1670287 is about 118.6488956611.

The spelling of 1670287 in words is "one million, six hundred seventy thousand, two hundred eighty-seven".