2157925 has 48 divisors (see below), whose sum is σ = 3571200. Its totient is φ = 1252800.

The previous prime is 2157923. The next prime is 2157989. The reversal of 2157925 is 5297512.

2157925 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2157925 - 2¹ = 2157923 is a prime.

It is a d-powerful number, because it can be written as 2¹⁰ + 1 + 5² + 7² + 9⁵ + 2²¹ + 5⁴ .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 36546 + ... + 36604.

It is an arithmetic number, because the mean of its divisors is an integer number (74400).

2^2157925 is an apocalyptic number.

2157925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2157925 is a deficient number, since it is larger than the sum of its proper divisors (1413275).

2157925 is a wasteful number, since it uses less digits than its factorization.

2157925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106 (or 101 counting only the distinct ones).

The product of its digits is 6300, while the sum is 31.

The square root of 2157925 is about 1468.9877467154. The cubic root of 2157925 is about 129.2246750662.

The spelling of 2157925 in words is "two million, one hundred fifty-seven thousand, nine hundred twenty-five".