2163925 has 12 divisors (see below), whose sum is σ = 2712996. Its totient is φ = 1712000.

The previous prime is 2163923. The next prime is 2163949. The reversal of 2163925 is 5293612.

It can be written as a sum of positive squares in 6 ways, for example, as 338724 + 1825201 = 582^2 + 1351^2 .

It is not a de Polignac number, because 2163925 - 2¹ = 2163923 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 2163893 and 2163902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2163923) 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, 2097 + ... + 2953.

It is an arithmetic number, because the mean of its divisors is an integer number (226083).

2^2163925 is an apocalyptic number.

2163925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2163925 is a deficient number, since it is larger than the sum of its proper divisors (549071).

2163925 is a wasteful number, since it uses less digits than its factorization.

2163925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968 (or 963 counting only the distinct ones).

The product of its digits is 3240, while the sum is 28.

The square root of 2163925 is about 1471.0285517283. The cubic root of 2163925 is about 129.3443317662.

The spelling of 2163925 in words is "two million, one hundred sixty-three thousand, nine hundred twenty-five".