34185421 has 4 divisors (see below), whose sum is σ = 34276000. Its totient is φ = 34094844.

The previous prime is 34185413. The next prime is 34185439. The reversal of 34185421 is 12458143.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12458143 = 491 ⋅25373.

It is a cyclic number.

It is not a de Polignac number, because 34185421 - 2³ = 34185413 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 34185421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34185451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44721 + ... + 45478.

It is an arithmetic number, because the mean of its divisors is an integer number (8569000).

Almost surely, 2^34185421 is an apocalyptic number.

It is an amenable number.

34185421 is a deficient number, since it is larger than the sum of its proper divisors (90579).

34185421 is an equidigital number, since it uses as much as digits as its factorization.

34185421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90578.

The product of its digits is 3840, while the sum is 28.

The square root of 34185421 is about 5846.8299958182. The cubic root of 34185421 is about 324.5490265850.

The spelling of 34185421 in words is "thirty-four million, one hundred eighty-five thousand, four hundred twenty-one".