1023439 has 4 divisors (see below), whose sum is σ = 1058760. Its totient is φ = 988120.

The previous prime is 1023419. The next prime is 1023461. The reversal of 1023439 is 9343201.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9343201 = 7 ⋅1334743.

It is a cyclic number.

It is not a de Polignac number, because 1023439 - 2⁷ = 1023311 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 (1023409) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17617 + ... + 17674.

It is an arithmetic number, because the mean of its divisors is an integer number (264690).

2^1023439 is an apocalyptic number.

1023439 is a deficient number, since it is larger than the sum of its proper divisors (35321).

1023439 is an equidigital number, since it uses as much as digits as its factorization.

1023439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35320.

The product of its (nonzero) digits is 648, while the sum is 22.

The square root of 1023439 is about 1011.6516198771. The cubic root of 1023439 is about 100.7752739701.

The spelling of 1023439 in words is "one million, twenty-three thousand, four hundred thirty-nine".