2857725 has 36 divisors (see below), whose sum is σ = 5517876. Its totient is φ = 1405440.

The previous prime is 2857721. The next prime is 2857753. The reversal of 2857725 is 5277582.

It can be written as a sum of positive squares in 6 ways, for example, as 15129 + 2842596 = 123^2 + 1686^2 .

It is not a de Polignac number, because 2857725 - 2² = 2857721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2857725.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2857721) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2437 + ... + 3413.

2^2857725 is an apocalyptic number.

2857725 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2857725 is a deficient number, since it is larger than the sum of its proper divisors (2660151).

2857725 is a wasteful number, since it uses less digits than its factorization.

2857725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1006 (or 998 counting only the distinct ones).

The product of its digits is 39200, while the sum is 36.

The square root of 2857725 is about 1690.4807008659. The cubic root of 2857725 is about 141.9079778049.

The spelling of 2857725 in words is "two million, eight hundred fifty-seven thousand, seven hundred twenty-five".