1523423 has 4 divisors (see below), whose sum is σ = 1661928. Its totient is φ = 1384920.

The previous prime is 1523419. The next prime is 1523429. The reversal of 1523423 is 3243251.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1523423 - 2² = 1523419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1523395 and 1523404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1523429) 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, 69236 + ... + 69257.

It is an arithmetic number, because the mean of its divisors is an integer number (415482).

2^1523423 is an apocalyptic number.

1523423 is a deficient number, since it is larger than the sum of its proper divisors (138505).

1523423 is a wasteful number, since it uses less digits than its factorization.

1523423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138504.

The product of its digits is 720, while the sum is 20.

The square root of 1523423 is about 1234.2702297309. The cubic root of 1523423 is about 115.0641859708.

Adding to 1523423 its reverse (3243251), we get a palindrome (4766674).

The spelling of 1523423 in words is "one million, five hundred twenty-three thousand, four hundred twenty-three".