34207421 has 2 divisors, whose sum is σ = 34207422. Its totient is φ = 34207420.

The previous prime is 34207409. The next prime is 34207423. The reversal of 34207421 is 12470243.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33235225 + 972196 = 5765^2 + 986^2 .

It is an emirp because it is prime and its reverse (12470243) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 34207421 - 2²² = 30013117 is a prime.

Together with 34207423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34207423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17103710 + 17103711.

It is an arithmetic number, because the mean of its divisors is an integer number (17103711).

Almost surely, 2^34207421 is an apocalyptic number.

It is an amenable number.

34207421 is a deficient number, since it is larger than the sum of its proper divisors (1).

34207421 is an equidigital number, since it uses as much as digits as its factorization.

34207421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 34207421 is about 5848.7110545829. The cubic root of 34207421 is about 324.6186327432.

Adding to 34207421 its reverse (12470243), we get a palindrome (46677664).

The spelling of 34207421 in words is "thirty-four million, two hundred seven thousand, four hundred twenty-one".