34242721 has 2 divisors, whose sum is σ = 34242722. Its totient is φ = 34242720.

The previous prime is 34242701. The next prime is 34242751. The reversal of 34242721 is 12724243.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21022225 + 13220496 = 4585^2 + 3636^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34242721 is a prime.

It is not a weakly prime, because it can be changed into another prime (34242701) 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, 17121360 + 17121361.

It is an arithmetic number, because the mean of its divisors is an integer number (17121361).

Almost surely, 2^34242721 is an apocalyptic number.

It is an amenable number.

34242721 is a deficient number, since it is larger than the sum of its proper divisors (1).

34242721 is an equidigital number, since it uses as much as digits as its factorization.

34242721 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 25.

The square root of 34242721 is about 5851.7280353755. The cubic root of 34242721 is about 324.7302566539.

Adding to 34242721 its reverse (12724243), we get a palindrome (46966964).

The spelling of 34242721 in words is "thirty-four million, two hundred forty-two thousand, seven hundred twenty-one".