34785521 has 2 divisors, whose sum is σ = 34785522. Its totient is φ = 34785520.

The previous prime is 34785473. The next prime is 34785539. The reversal of 34785521 is 12558743.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24641296 + 10144225 = 4964^2 + 3185^2 .

It is an emirp because it is prime and its reverse (12558743) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 34785521 - 2²² = 30591217 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (34785551) 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, 17392760 + 17392761.

It is an arithmetic number, because the mean of its divisors is an integer number (17392761).

Almost surely, 2^34785521 is an apocalyptic number.

It is an amenable number.

34785521 is a deficient number, since it is larger than the sum of its proper divisors (1).

34785521 is an equidigital number, since it uses as much as digits as its factorization.

34785521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 33600, while the sum is 35.

The square root of 34785521 is about 5897.9251436416. The cubic root of 34785521 is about 326.4370948215.

The spelling of 34785521 in words is "thirty-four million, seven hundred eighty-five thousand, five hundred twenty-one".