2118925 has 12 divisors (see below), whose sum is σ = 2651616. Its totient is φ = 1679600.

The previous prime is 2118923. The next prime is 2118959. The reversal of 2118925 is 5298112.

It is not a de Polignac number, because 2118925 - 2¹ = 2118923 is a prime.

It is a Duffinian number.

2118925 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2118893 and 2118902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2118923) 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, 2952 + ... + 3598.

It is an arithmetic number, because the mean of its divisors is an integer number (220968).

2^2118925 is an apocalyptic number.

2118925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2118925 is a deficient number, since it is larger than the sum of its proper divisors (532691).

2118925 is a wasteful number, since it uses less digits than its factorization.

2118925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788 (or 783 counting only the distinct ones).

The product of its digits is 1440, while the sum is 28.

The square root of 2118925 is about 1455.6527745311. The cubic root of 2118925 is about 128.4414485933.

The spelling of 2118925 in words is "two million, one hundred eighteen thousand, nine hundred twenty-five".