1538423 has 4 divisors (see below), whose sum is σ = 1580040. Its totient is φ = 1496808.

The previous prime is 1538419. The next prime is 1538429. The reversal of 1538423 is 3248351.

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 1538423 - 2² = 1538419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1538392 and 1538401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1538429) 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, 20753 + ... + 20826.

It is an arithmetic number, because the mean of its divisors is an integer number (395010).

2^1538423 is an apocalyptic number.

1538423 is a deficient number, since it is larger than the sum of its proper divisors (41617).

1538423 is an equidigital number, since it uses as much as digits as its factorization.

1538423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41616.

The product of its digits is 2880, while the sum is 26.

The square root of 1538423 is about 1240.3318104443. The cubic root of 1538423 is about 115.4406033813.

The spelling of 1538423 in words is "one million, five hundred thirty-eight thousand, four hundred twenty-three".