1428813 has 8 divisors (see below), whose sum is σ = 2116800. Its totient is φ = 952524.

The previous prime is 1428811. The next prime is 1428839. The reversal of 1428813 is 3188241.

It is not a de Polignac number, because 1428813 - 2¹ = 1428811 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 52919 = 1428813 / (1 + 4 + 2 + 8 + 8 + 1 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26433 + ... + 26486.

It is an arithmetic number, because the mean of its divisors is an integer number (264600).

2^1428813 is an apocalyptic number.

It is an amenable number.

1428813 is a deficient number, since it is larger than the sum of its proper divisors (687987).

1428813 is an equidigital number, since it uses as much as digits as its factorization.

1428813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52928 (or 52922 counting only the distinct ones).

The product of its digits is 1536, while the sum is 27.

The square root of 1428813 is about 1195.3296616415. The cubic root of 1428813 is about 112.6311359704.

It can be divided in two parts, 142881 and 3, that added together give a square (142884 = 378²).

The spelling of 1428813 in words is "one million, four hundred twenty-eight thousand, eight hundred thirteen".