1611289 has 2 divisors, whose sum is σ = 1611290. Its totient is φ = 1611288.

The previous prime is 1611251. The next prime is 1611293. The reversal of 1611289 is 9821161.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1166400 + 444889 = 1080^2 + 667^2 .

It is a cyclic number.

It is not a de Polignac number, because 1611289 - 2⁷ = 1611161 is a prime.

1611289 is a lucky number.

It is not a weakly prime, because it can be changed into another prime (1611299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 805644 + 805645.

It is an arithmetic number, because the mean of its divisors is an integer number (805645).

2^1611289 is an apocalyptic number.

It is an amenable number.

1611289 is a deficient number, since it is larger than the sum of its proper divisors (1).

1611289 is an equidigital number, since it uses as much as digits as its factorization.

1611289 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 864, while the sum is 28.

The square root of 1611289 is about 1269.3655895761. The cubic root of 1611289 is about 117.2351420746.

The spelling of 1611289 in words is "one million, six hundred eleven thousand, two hundred eighty-nine".