1428725 has 6 divisors (see below), whose sum is σ = 1771650. Its totient is φ = 1142960.

The previous prime is 1428709. The next prime is 1428751. The reversal of 1428725 is 5278241.

It can be written as a sum of positive squares in 3 ways, for example, as 5476 + 1423249 = 74^2 + 1193^2 .

It is not a de Polignac number, because 1428725 - 2⁴ = 1428709 is a prime.

It is a congruent number.

It is an unprimeable number.

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, 28550 + ... + 28599.

It is an arithmetic number, because the mean of its divisors is an integer number (295275).

2^1428725 is an apocalyptic number.

It is an amenable number.

1428725 is a deficient number, since it is larger than the sum of its proper divisors (342925).

1428725 is an equidigital number, since it uses as much as digits as its factorization.

1428725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57159 (or 57154 counting only the distinct ones).

The product of its digits is 4480, while the sum is 29.

The square root of 1428725 is about 1195.2928511457. The cubic root of 1428725 is about 112.6288236213.

The spelling of 1428725 in words is "one million, four hundred twenty-eight thousand, seven hundred twenty-five".