1669249 has 2 divisors, whose sum is σ = 1669250. Its totient is φ = 1669248.

The previous prime is 1669243. The next prime is 1669253. The reversal of 1669249 is 9429661.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1040400 + 628849 = 1020^2 + 793^2 .

It is a cyclic number.

It is not a de Polignac number, because 1669249 - 2⁷ = 1669121 is a prime.

It is not a weakly prime, because it can be changed into another prime (1669243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 834624 + 834625.

It is an arithmetic number, because the mean of its divisors is an integer number (834625).

2^1669249 is an apocalyptic number.

It is an amenable number.

1669249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1669249 is an equidigital number, since it uses as much as digits as its factorization.

1669249 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 37.

The square root of 1669249 is about 1291.9941950334. The cubic root of 1669249 is about 118.6243124459.

The spelling of 1669249 in words is "one million, six hundred sixty-nine thousand, two hundred forty-nine".