34045021 has 2 divisors, whose sum is σ = 34045022. Its totient is φ = 34045020.

The previous prime is 34045019. The next prime is 34045031. The reversal of 34045021 is 12054043.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21724921 + 12320100 = 4661^2 + 3510^2 .

It is a cyclic number.

It is not a de Polignac number, because 34045021 - 2¹ = 34045019 is a prime.

Together with 34045019, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 34045021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34045031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17022510 + 17022511.

It is an arithmetic number, because the mean of its divisors is an integer number (17022511).

Almost surely, 2^34045021 is an apocalyptic number.

It is an amenable number.

34045021 is a deficient number, since it is larger than the sum of its proper divisors (1).

34045021 is an equidigital number, since it uses as much as digits as its factorization.

34045021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 34045021 is about 5834.8111366179. The cubic root of 34045021 is about 324.1041078085.

Adding to 34045021 its reverse (12054043), we get a palindrome (46099064).

The spelling of 34045021 in words is "thirty-four million, forty-five thousand, twenty-one".