1428625 has 16 divisors (see below), whose sum is σ = 1946880. Its totient is φ = 1038000.

The previous prime is 1428613. The next prime is 1428631. The reversal of 1428625 is 5268241.

It is not a de Polignac number, because 1428625 - 2⁵ = 1428593 is a prime.

1428625 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1428593 and 1428602.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 856 + ... + 1894.

It is an arithmetic number, because the mean of its divisors is an integer number (121680).

2^1428625 is an apocalyptic number.

It is an amenable number.

1428625 is a deficient number, since it is larger than the sum of its proper divisors (518255).

1428625 is a wasteful number, since it uses less digits than its factorization.

1428625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1065 (or 1055 counting only the distinct ones).

The product of its digits is 3840, while the sum is 28.

The square root of 1428625 is about 1195.2510196607. The cubic root of 1428625 is about 112.6261958366.

The spelling of 1428625 in words is "one million, four hundred twenty-eight thousand, six hundred twenty-five".