34120421 has 4 divisors (see below), whose sum is σ = 34193952. Its totient is φ = 34046892.

The previous prime is 34120403. The next prime is 34120439. The reversal of 34120421 is 12402143.

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: 12402143 = 13 ⋅954011.

It is an interprime number because it is at equal distance from previous prime (34120403) and next prime (34120439).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34120421 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 34120421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (34120451) 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, 36065 + ... + 36998.

It is an arithmetic number, because the mean of its divisors is an integer number (8548488).

Almost surely, 2^34120421 is an apocalyptic number.

It is an amenable number.

34120421 is a deficient number, since it is larger than the sum of its proper divisors (73531).

34120421 is an equidigital number, since it uses as much as digits as its factorization.

34120421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73530.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 34120421 is about 5841.2687834066. The cubic root of 34120421 is about 324.3431974073.

Adding to 34120421 its reverse (12402143), we get a palindrome (46522564).

The spelling of 34120421 in words is "thirty-four million, one hundred twenty thousand, four hundred twenty-one".