428725 has 12 divisors (see below), whose sum is σ = 580320. Its totient is φ = 311600.

The previous prime is 428693. The next prime is 428731. The reversal of 428725 is 527824.

It is not a de Polignac number, because 428725 - 2⁵ = 428693 is a prime.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 428693 and 428702.

It is a congruent number.

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, 505 + ... + 1054.

It is an arithmetic number, because the mean of its divisors is an integer number (48360).

2⁴²⁸⁷²⁵ is an apocalyptic number.

It is an amenable number.

428725 is a deficient number, since it is larger than the sum of its proper divisors (151595).

428725 is a wasteful number, since it uses less digits than its factorization.

428725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580 (or 1575 counting only the distinct ones).

The product of its digits is 4480, while the sum is 28.

The square root of 428725 is about 654.7709523184. The cubic root of 428725 is about 75.4037485208.

Subtracting 428725 from its reverse (527824), we obtain a palindrome (99099).

The spelling of 428725 in words is "four hundred twenty-eight thousand, seven hundred twenty-five".