2101925 has 12 divisors (see below), whose sum is σ = 2978976. Its totient is φ = 1441200.

The previous prime is 2101909. The next prime is 2101961. The reversal of 2101925 is 5291012.

It is not a de Polignac number, because 2101925 - 2⁴ = 2101909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2101897 and 2101906.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5831 + ... + 6180.

It is an arithmetic number, because the mean of its divisors is an integer number (248248).

2^2101925 is an apocalyptic number.

2101925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2101925 is a deficient number, since it is larger than the sum of its proper divisors (877051).

2101925 is a wasteful number, since it uses less digits than its factorization.

2101925 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12028 (or 12023 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 20.

The square root of 2101925 is about 1449.8017105798. The cubic root of 2101925 is about 128.0970333566.

Adding to 2101925 its reverse (5291012), we get a palindrome (7392937).

The spelling of 2101925 in words is "two million, one hundred one thousand, nine hundred twenty-five".