1428723 has 6 divisors (see below), whose sum is σ = 2063724. Its totient is φ = 952476.

The previous prime is 1428709. The next prime is 1428751. The reversal of 1428723 is 3278241.

It is not a de Polignac number, because 1428723 - 2¹⁴ = 1412339 is a prime.

It is a d-powerful number, because it can be written as 1 + 4⁸ + 2 + 8 + 7⁷ + 2¹³ + 3¹² .

It is not an unprimeable number, because it can be changed into a prime (1428703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 79365 + ... + 79382.

It is an arithmetic number, because the mean of its divisors is an integer number (343954).

2^1428723 is an apocalyptic number.

1428723 is a deficient number, since it is larger than the sum of its proper divisors (635001).

1428723 is a wasteful number, since it uses less digits than its factorization.

1428723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158753 (or 158750 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 1428723 is about 1195.2920145303. The cubic root of 1428723 is about 112.6287710668.

The spelling of 1428723 in words is "one million, four hundred twenty-eight thousand, seven hundred twenty-three".