2159125 has 16 divisors (see below), whose sum is σ = 2815488. Its totient is φ = 1650000.

The previous prime is 2159093. The next prime is 2159147. The reversal of 2159125 is 5219512.

It is not a de Polignac number, because 2159125 - 2⁵ = 2159093 is a prime.

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

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2159125.

It is a congruent number.

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, 2500 + ... + 3250.

It is an arithmetic number, because the mean of its divisors is an integer number (175968).

2^2159125 is an apocalyptic number.

2159125 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2159125 is a deficient number, since it is larger than the sum of its proper divisors (656363).

2159125 is an equidigital number, since it uses as much as digits as its factorization.

2159125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 789 (or 779 counting only the distinct ones).

The product of its digits is 900, while the sum is 25.

The square root of 2159125 is about 1469.3961344716. The cubic root of 2159125 is about 129.2486241337.

The spelling of 2159125 in words is "two million, one hundred fifty-nine thousand, one hundred twenty-five".