2134721 has 2 divisors, whose sum is σ = 2134722. Its totient is φ = 2134720.

The previous prime is 2134709. The next prime is 2134751. The reversal of 2134721 is 1274312.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2002225 + 132496 = 1415^2 + 364^2 .

It is a cyclic number.

It is not a de Polignac number, because 2134721 - 2¹⁰ = 2133697 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2134693 and 2134702.

It is not a weakly prime, because it can be changed into another prime (2134751) by changing a digit.

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 as a sum of consecutive naturals, namely, 1067360 + 1067361.

It is an arithmetic number, because the mean of its divisors is an integer number (1067361).

2^2134721 is an apocalyptic number.

It is an amenable number.

2134721 is a deficient number, since it is larger than the sum of its proper divisors (1).

2134721 is an equidigital number, since it uses as much as digits as its factorization.

2134721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 336, while the sum is 20.

The square root of 2134721 is about 1461.0684446664. The cubic root of 2134721 is about 128.7598239276.

The spelling of 2134721 in words is "two million, one hundred thirty-four thousand, seven hundred twenty-one".