2134021 has 2 divisors, whose sum is σ = 2134022. Its totient is φ = 2134020.

The previous prime is 2134019. The next prime is 2134063. The reversal of 2134021 is 1204312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1240996 + 893025 = 1114^2 + 945^2 .

It is a cyclic number.

It is not a de Polignac number, because 2134021 - 2¹ = 2134019 is a prime.

Together with 2134019, it forms a pair of twin primes.

It is a d-powerful number, because it can be written as 2¹⁵ + 1 + 3 + 4⁶ + 0 + 2²¹ + 1 .

It is a junction number, because it is equal to n+sod(n) for n = 2133992 and 2134010.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2134621) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1067010 + 1067011.

It is an arithmetic number, because the mean of its divisors is an integer number (1067011).

2^2134021 is an apocalyptic number.

It is an amenable number.

2134021 is a deficient number, since it is larger than the sum of its proper divisors (1).

2134021 is an equidigital number, since it uses as much as digits as its factorization.

2134021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48, while the sum is 13.

The square root of 2134021 is about 1460.8288743039. The cubic root of 2134021 is about 128.7457484379.

Adding to 2134021 its reverse (1204312), we get a palindrome (3338333).

The spelling of 2134021 in words is "two million, one hundred thirty-four thousand, twenty-one".