34256021 has 2 divisors, whose sum is σ = 34256022. Its totient is φ = 34256020.

The previous prime is 34256017. The next prime is 34256029. The reversal of 34256021 is 12065243.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31516996 + 2739025 = 5614^2 + 1655^2 .

It is a cyclic number.

It is not a de Polignac number, because 34256021 - 2² = 34256017 is a prime.

It is a Chen prime.

It is equal to p_2103980 and since 34256021 and 2103980 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34256029) 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, 17128010 + 17128011.

It is an arithmetic number, because the mean of its divisors is an integer number (17128011).

Almost surely, 2^34256021 is an apocalyptic number.

It is an amenable number.

34256021 is a deficient number, since it is larger than the sum of its proper divisors (1).

34256021 is an equidigital number, since it uses as much as digits as its factorization.

34256021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 34256021 is about 5852.8643414998. The cubic root of 34256021 is about 324.7722933578.

The spelling of 34256021 in words is "thirty-four million, two hundred fifty-six thousand, twenty-one".