1239423 has 4 divisors (see below), whose sum is σ = 1652568. Its totient is φ = 826280.

The previous prime is 1239421. The next prime is 1239443. The reversal of 1239423 is 3249321.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3249321 = 3 ⋅1083107.

It is a cyclic number.

It is not a de Polignac number, because 1239423 - 2¹ = 1239421 is a prime.

It is a D-number.

It is a junction number, because it is equal to n+sod(n) for n = 1239393 and 1239402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1239421) 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, 206568 + ... + 206573.

It is an arithmetic number, because the mean of its divisors is an integer number (413142).

2^1239423 is an apocalyptic number.

1239423 is a deficient number, since it is larger than the sum of its proper divisors (413145).

1239423 is an equidigital number, since it uses as much as digits as its factorization.

1239423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 413144.

The product of its digits is 1296, while the sum is 24.

The square root of 1239423 is about 1113.2937617718. The cubic root of 1239423 is about 107.4170407369.

The spelling of 1239423 in words is "one million, two hundred thirty-nine thousand, four hundred twenty-three".