134224021 has 4 divisors (see below), whose sum is σ = 140059872. Its totient is φ = 128388172.

The previous prime is 134224019. The next prime is 134224033. The reversal of 134224021 is 120422431.

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.

It is a cyclic number.

It is not a de Polignac number, because 134224021 - 2¹ = 134224019 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 134224021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134224001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2917891 + ... + 2917936.

It is an arithmetic number, because the mean of its divisors is an integer number (35014968).

Almost surely, 2^134224021 is an apocalyptic number.

It is an amenable number.

134224021 is a deficient number, since it is larger than the sum of its proper divisors (5835851).

134224021 is an equidigital number, since it uses as much as digits as its factorization.

134224021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5835850.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 134224021 is about 11585.5090954174. The cubic root of 134224021 is about 512.0080018382.

Adding to 134224021 its reverse (120422431), we get a palindrome (254646452).

The spelling of 134224021 in words is "one hundred thirty-four million, two hundred twenty-four thousand, twenty-one".