1428583 has 4 divisors (see below), whose sum is σ = 1538488. Its totient is φ = 1318680.

The previous prime is 1428571. The next prime is 1428587. The reversal of 1428583 is 3858241.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3858241 = 53 ⋅72797.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1428583 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428587) 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, 54933 + ... + 54958.

It is an arithmetic number, because the mean of its divisors is an integer number (384622).

2^1428583 is an apocalyptic number.

1428583 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1428583 is a deficient number, since it is larger than the sum of its proper divisors (109905).

1428583 is a wasteful number, since it uses less digits than its factorization.

1428583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109904.

The product of its digits is 7680, while the sum is 31.

The square root of 1428583 is about 1195.2334500005. The cubic root of 1428583 is about 112.6250921305.

The spelling of 1428583 in words is "one million, four hundred twenty-eight thousand, five hundred eighty-three".