1428023 has 4 divisors (see below), whose sum is σ = 1448208. Its totient is φ = 1407840.

The previous prime is 1428013. The next prime is 1428029. The reversal of 1428023 is 3208241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3208241 = 29 ⋅110629.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1428023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1427986 and 1428004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428029) 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, 9986 + ... + 10127.

It is an arithmetic number, because the mean of its divisors is an integer number (362052).

2^1428023 is an apocalyptic number.

1428023 is a deficient number, since it is larger than the sum of its proper divisors (20185).

1428023 is an equidigital number, since it uses as much as digits as its factorization.

1428023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20184.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1428023 is about 1194.9991631796. Note that the first 3 decimals coincide. The cubic root of 1428023 is about 112.6103739810.

The spelling of 1428023 in words is "one million, four hundred twenty-eight thousand, twenty-three".