1671289 has 2 divisors, whose sum is σ = 1671290. Its totient is φ = 1671288.

The previous prime is 1671277. The next prime is 1671311. The reversal of 1671289 is 9821761.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1669264 + 2025 = 1292^2 + 45^2 .

It is a cyclic number.

It is not a de Polignac number, because 1671289 - 2⁷ = 1671161 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (1671209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 835644 + 835645.

It is an arithmetic number, because the mean of its divisors is an integer number (835645).

2^1671289 is an apocalyptic number.

It is an amenable number.

1671289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1671289 is an equidigital number, since it uses as much as digits as its factorization.

1671289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 34.

The square root of 1671289 is about 1292.7834312057. The cubic root of 1671289 is about 118.6726166201.

It can be divided in two parts, 16 and 71289, that multiplied together give a square (1140624 = 1068²).

The spelling of 1671289 in words is "one million, six hundred seventy-one thousand, two hundred eighty-nine".