34521421 has 6 divisors (see below), whose sum is σ = 37945166. Its totient is φ = 31383000.

The previous prime is 34521419. The next prime is 34521437. The reversal of 34521421 is 12412543.

It can be written as a sum of positive squares in only one way, i.e., 30858025 + 3663396 = 5555^2 + 1914^2 .

It is not a de Polignac number, because 34521421 - 2¹ = 34521419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 34521392 and 34521401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34521451) 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 in 5 ways as a sum of consecutive naturals, for example, 142530 + ... + 142771.

Almost surely, 2^34521421 is an apocalyptic number.

It is an amenable number.

34521421 is a deficient number, since it is larger than the sum of its proper divisors (3423745).

34521421 is a wasteful number, since it uses less digits than its factorization.

34521421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285323 (or 285312 counting only the distinct ones).

The product of its digits is 960, while the sum is 22.

The square root of 34521421 is about 5875.4932558892. The cubic root of 34521421 is about 325.6088657191.

Adding to 34521421 its reverse (12412543), we get a palindrome (46933964).

The spelling of 34521421 in words is "thirty-four million, five hundred twenty-one thousand, four hundred twenty-one".