1428825 has 12 divisors (see below), whose sum is σ = 2362448. Its totient is φ = 762000.

The previous prime is 1428811. The next prime is 1428839. The reversal of 1428825 is 5288241.

It is an interprime number because it is at equal distance from previous prime (1428811) and next prime (1428839).

It is not a de Polignac number, because 1428825 - 2⁵ = 1428793 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1428792 and 1428801.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9451 + ... + 9600.

2^1428825 is an apocalyptic number.

1428825 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1428825 is a deficient number, since it is larger than the sum of its proper divisors (933623).

1428825 is a wasteful number, since it uses less digits than its factorization.

1428825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19064 (or 19059 counting only the distinct ones).

The product of its digits is 5120, while the sum is 30.

The square root of 1428825 is about 1195.3346811667. The cubic root of 1428825 is about 112.6314512834.

The spelling of 1428825 in words is "one million, four hundred twenty-eight thousand, eight hundred twenty-five".