34521021 has 6 divisors (see below), whose sum is σ = 49863710. Its totient is φ = 23014008.

The previous prime is 34521017. The next prime is 34521023. The reversal of 34521021 is 12012543.

It can be written as a sum of positive squares in only one way, i.e., 27941796 + 6579225 = 5286^2 + 2565^2 .

It is not a de Polignac number, because 34521021 - 2² = 34521017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 34520985 and 34521003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34521023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1917826 + ... + 1917843.

Almost surely, 2^34521021 is an apocalyptic number.

It is an amenable number.

34521021 is a deficient number, since it is larger than the sum of its proper divisors (15342689).

34521021 is a wasteful number, since it uses less digits than its factorization.

34521021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3835675 (or 3835672 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 34521021 is about 5875.4592160954. The cubic root of 34521021 is about 325.6076081034.

Adding to 34521021 its reverse (12012543), we get a palindrome (46533564).

The spelling of 34521021 in words is "thirty-four million, five hundred twenty-one thousand, twenty-one".