2143825 has 12 divisors (see below), whose sum is σ = 2750940. Its totient is φ = 1655360.

The previous prime is 2143793. The next prime is 2143829. The reversal of 2143825 is 5283412.

It can be written as a sum of positive squares in 6 ways, for example, as 186624 + 1957201 = 432^2 + 1399^2 .

It is not a de Polignac number, because 2143825 - 2⁵ = 2143793 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a d-powerful number, because it can be written as 2¹³ + 1 + 4⁷ + 3¹³ + 8³ + 2¹⁹ + 5³ .

It is a self number, because there is not a number n which added to its sum of digits gives 2143825.

It is not an unprimeable number, because it can be changed into a prime (2143829) 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, 754 + ... + 2203.

It is an arithmetic number, because the mean of its divisors is an integer number (229245).

2^2143825 is an apocalyptic number.

2143825 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2143825 is a deficient number, since it is larger than the sum of its proper divisors (607115).

2143825 is a wasteful number, since it uses less digits than its factorization.

2143825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2996 (or 2991 counting only the distinct ones).

The product of its digits is 1920, while the sum is 25.

The square root of 2143825 is about 1464.1806582523. The cubic root of 2143825 is about 128.9426061212.

The spelling of 2143825 in words is "two million, one hundred forty-three thousand, eight hundred twenty-five".