34135621 has 4 divisors (see below), whose sum is σ = 36761452. Its totient is φ = 31509792.

The previous prime is 34135613. The next prime is 34135627. The reversal of 34135621 is 12653143.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12653143 = 499 ⋅25357.

It can be written as a sum of positive squares in 2 ways, for example, as 9235521 + 24900100 = 3039^2 + 4990^2 .

It is a cyclic number.

It is not a de Polignac number, because 34135621 - 2³ = 34135613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34135627) 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 3 ways as a sum of consecutive naturals, for example, 1312896 + ... + 1312921.

It is an arithmetic number, because the mean of its divisors is an integer number (9190363).

Almost surely, 2^34135621 is an apocalyptic number.

It is an amenable number.

34135621 is a deficient number, since it is larger than the sum of its proper divisors (2625831).

34135621 is a wasteful number, since it uses less digits than its factorization.

34135621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2625830.

The product of its digits is 2160, while the sum is 25.

The square root of 34135621 is about 5842.5697257286. The cubic root of 34135621 is about 324.3913531701.

Adding to 34135621 its reverse (12653143), we get a palindrome (46788764).

The spelling of 34135621 in words is "thirty-four million, one hundred thirty-five thousand, six hundred twenty-one".