2125021 has 8 divisors (see below), whose sum is σ = 2213120. Its totient is φ = 2038608.

The previous prime is 2125009. The next prime is 2125037. The reversal of 2125021 is 1205212.

2125021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2125021 - 2⁹ = 2124509 is a prime.

It is a Duffinian number.

2125021 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2124992 and 2125010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2125001) 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 7 ways as a sum of consecutive naturals, for example, 2560 + ... + 3286.

It is an arithmetic number, because the mean of its divisors is an integer number (276640).

2^2125021 is an apocalyptic number.

It is an amenable number.

2125021 is a deficient number, since it is larger than the sum of its proper divisors (88099).

2125021 is an equidigital number, since it uses as much as digits as its factorization.

2125021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843.

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 2125021 is about 1457.7451766341. The cubic root of 2125021 is about 128.5645030367.

The spelling of 2125021 in words is "two million, one hundred twenty-five thousand, twenty-one".