2721401 has 2 divisors, whose sum is σ = 2721402. Its totient is φ = 2721400.

The previous prime is 2721371. The next prime is 2721413. The reversal of 2721401 is 1041272.

2721401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2706025 + 15376 = 1645^2 + 124^2 .

It is a cyclic number.

It is not a de Polignac number, because 2721401 - 2¹⁸ = 2459257 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2721401.

It is not a weakly prime, because it can be changed into another prime (2721421) 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 as a sum of consecutive naturals, namely, 1360700 + 1360701.

It is an arithmetic number, because the mean of its divisors is an integer number (1360701).

2^2721401 is an apocalyptic number.

It is an amenable number.

2721401 is a deficient number, since it is larger than the sum of its proper divisors (1).

2721401 is an equidigital number, since it uses as much as digits as its factorization.

2721401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 112, while the sum is 17.

The square root of 2721401 is about 1649.6669360813. Note that the first 3 decimals coincide. The cubic root of 2721401 is about 139.6146033059.

Adding to 2721401 its reverse (1041272), we get a palindrome (3762673).

The spelling of 2721401 in words is "two million, seven hundred twenty-one thousand, four hundred one".