1428125 has 12 divisors (see below), whose sum is σ = 1788948. Its totient is φ = 1140000.

The previous prime is 1428113. The next prime is 1428127. The reversal of 1428125 is 5218241.

It can be written as a sum of positive squares in 6 ways, for example, as 925444 + 502681 = 962^2 + 709^2 .

It is not a de Polignac number, because 1428125 - 2⁴ = 1428109 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1428125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1428127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2897 + ... + 3353.

It is an arithmetic number, because the mean of its divisors is an integer number (149079).

2^1428125 is an apocalyptic number.

It is an amenable number.

1428125 is a deficient number, since it is larger than the sum of its proper divisors (360823).

1428125 is an frugal number, since it uses more digits than its factorization.

1428125 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482 (or 462 counting only the distinct ones).

The product of its digits is 640, while the sum is 23.

The square root of 1428125 is about 1195.0418402717. The cubic root of 1428125 is about 112.6130550733.

The spelling of 1428125 in words is "one million, four hundred twenty-eight thousand, one hundred twenty-five".