1289425 has 6 divisors (see below), whose sum is σ = 1598918. Its totient is φ = 1031520.

The previous prime is 1289423. The next prime is 1289429. The reversal of 1289425 is 5249821.

It can be written as a sum of positive squares in 3 ways, for example, as 88209 + 1201216 = 297^2 + 1096^2 .

It is not a de Polignac number, because 1289425 - 2¹ = 1289423 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1289423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 25764 + ... + 25813.

2^1289425 is an apocalyptic number.

It is an amenable number.

1289425 is a deficient number, since it is larger than the sum of its proper divisors (309493).

1289425 is an equidigital number, since it uses as much as digits as its factorization.

1289425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51587 (or 51582 counting only the distinct ones).

The product of its digits is 5760, while the sum is 31.

The square root of 1289425 is about 1135.5285113109. The cubic root of 1289425 is about 108.8425468418.

The spelling of 1289425 in words is "one million, two hundred eighty-nine thousand, four hundred twenty-five".