3417721 has 2 divisors, whose sum is σ = 3417722. Its totient is φ = 3417720.

The previous prime is 3417707. The next prime is 3417749. The reversal of 3417721 is 1277143.

It is a happy number.

3417721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1929321 + 1488400 = 1389^2 + 1220^2 .

It is a cyclic number.

It is not a de Polignac number, because 3417721 - 2¹³ = 3409529 is a prime.

3417721 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3417751) 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, 1708860 + 1708861.

It is an arithmetic number, because the mean of its divisors is an integer number (1708861).

Almost surely, 2^3417721 is an apocalyptic number.

It is an amenable number.

3417721 is a deficient number, since it is larger than the sum of its proper divisors (1).

3417721 is an equidigital number, since it uses as much as digits as its factorization.

3417721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1176, while the sum is 25.

The square root of 3417721 is about 1848.7079271751. The cubic root of 3417721 is about 150.6302518787.

It can be divided in two parts, 34177 and 21, that multiplied together give a palindrome (717717).

The spelling of 3417721 in words is "three million, four hundred seventeen thousand, seven hundred twenty-one".