1289375 has 10 divisors (see below), whose sum is σ = 1611984. Its totient is φ = 1031000.

The previous prime is 1289371. The next prime is 1289381. The reversal of 1289375 is 5739821.

It is not a de Polignac number, because 1289375 - 2² = 1289371 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1289371) 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 in 9 ways as a sum of consecutive naturals, for example, 407 + ... + 1656.

2^1289375 is an apocalyptic number.

1289375 is a deficient number, since it is larger than the sum of its proper divisors (322609).

1289375 is an frugal number, since it uses more digits than its factorization.

1289375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2083 (or 2068 counting only the distinct ones).

The product of its digits is 15120, while the sum is 35.

The square root of 1289375 is about 1135.5064949176. The cubic root of 1289375 is about 108.8411399621.

The spelling of 1289375 in words is "one million, two hundred eighty-nine thousand, three hundred seventy-five".