1238723 has 4 divisors (see below), whose sum is σ = 1272240. Its totient is φ = 1205208.

The previous prime is 1238719. The next prime is 1238747. The reversal of 1238723 is 3278321.

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 1238723 - 2² = 1238719 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1238692 and 1238701.

It is not an unprimeable number, because it can be changed into a prime (1238023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16703 + ... + 16776.

It is an arithmetic number, because the mean of its divisors is an integer number (318060).

2^1238723 is an apocalyptic number.

1238723 is a deficient number, since it is larger than the sum of its proper divisors (33517).

1238723 is an equidigital number, since it uses as much as digits as its factorization.

1238723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33516.

The product of its digits is 2016, while the sum is 26.

The square root of 1238723 is about 1112.9793349384. The cubic root of 1238723 is about 107.3968146348.

The spelling of 1238723 in words is "one million, two hundred thirty-eight thousand, seven hundred twenty-three".