1025389 has 4 divisors (see below), whose sum is σ = 1085724. Its totient is φ = 965056.

The previous prime is 1025383. The next prime is 1025393. The reversal of 1025389 is 9835201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9835201 = 719 ⋅13679.

It can be written as a sum of positive squares in 2 ways, for example, as 311364 + 714025 = 558^2 + 845^2 .

It is not a de Polignac number, because 1025389 - 2⁷ = 1025261 is a prime.

It is a Duffinian number.

1025389 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1025383) 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 3 ways as a sum of consecutive naturals, for example, 30142 + ... + 30175.

It is an arithmetic number, because the mean of its divisors is an integer number (271431).

2^1025389 is an apocalyptic number.

It is an amenable number.

1025389 is a deficient number, since it is larger than the sum of its proper divisors (60335).

1025389 is an equidigital number, since it uses as much as digits as its factorization.

1025389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60334.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 1025389 is about 1012.6149317485. The cubic root of 1025389 is about 100.8392371078.

The spelling of 1025389 in words is "one million, twenty-five thousand, three hundred eighty-nine".