1229723 has 6 divisors (see below), whose sum is σ = 1351812. Its totient is φ = 1117820.

The previous prime is 1229719. The next prime is 1229731. The reversal of 1229723 is 3279221.

It is not a de Polignac number, because 1229723 - 2² = 1229719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1229692 and 1229701.

It is not an unprimeable number, because it can be changed into a prime (1229743) 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 5 ways as a sum of consecutive naturals, for example, 4961 + ... + 5202.

It is an arithmetic number, because the mean of its divisors is an integer number (225302).

2^1229723 is an apocalyptic number.

1229723 is a deficient number, since it is larger than the sum of its proper divisors (122089).

1229723 is a wasteful number, since it uses less digits than its factorization.

1229723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10185 (or 10174 counting only the distinct ones).

The product of its digits is 1512, while the sum is 26.

The square root of 1229723 is about 1108.9287623648. The cubic root of 1229723 is about 107.1360832966.

The spelling of 1229723 in words is "one million, two hundred twenty-nine thousand, seven hundred twenty-three".