2141021 has 4 divisors (see below), whose sum is σ = 2146812. Its totient is φ = 2135232.

The previous prime is 2140993. The next prime is 2141033. The reversal of 2141021 is 1201412.

2141021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1792921 + 348100 = 1339^2 + 590^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2141021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2140993 and 2141011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2141071) 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 3 ways as a sum of consecutive naturals, for example, 2300 + ... + 3093.

It is an arithmetic number, because the mean of its divisors is an integer number (536703).

2^2141021 is an apocalyptic number.

It is an amenable number.

2141021 is a deficient number, since it is larger than the sum of its proper divisors (5791).

2141021 is an equidigital number, since it uses as much as digits as its factorization.

2141021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5790.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 2141021 is about 1463.2228128347. Note that the first 3 decimals coincide. The cubic root of 2141021 is about 128.8863650858.

Adding to 2141021 its reverse (1201412), we get a palindrome (3342433).

The spelling of 2141021 in words is "two million, one hundred forty-one thousand, twenty-one".