1422723 has 4 divisors (see below), whose sum is σ = 1896968. Its totient is φ = 948480.

The previous prime is 1422721. The next prime is 1422727. The reversal of 1422723 is 3272241.

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

It is not a de Polignac number, because 1422723 - 2¹ = 1422721 is a prime.

It is an Ulam number.

It is a D-number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1422723.

It is not an unprimeable number, because it can be changed into a prime (1422721) 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, 237118 + ... + 237123.

It is an arithmetic number, because the mean of its divisors is an integer number (474242).

2^1422723 is an apocalyptic number.

1422723 is a deficient number, since it is larger than the sum of its proper divisors (474245).

1422723 is an equidigital number, since it uses as much as digits as its factorization.

1422723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474244.

The product of its digits is 672, while the sum is 21.

The square root of 1422723 is about 1192.7795269873. The cubic root of 1422723 is about 112.4708862935.

Adding to 1422723 its reverse (3272241), we get a palindrome (4694964).

It can be divided in two parts, 1422 and 723, that added together give a triangular number (2145 = T₆₅).

The spelling of 1422723 in words is "one million, four hundred twenty-two thousand, seven hundred twenty-three".