134420421 has 16 divisors (see below), whose sum is σ = 188945600. Its totient is φ = 84768768.

The previous prime is 134420399. The next prime is 134420443. The reversal of 134420421 is 124024431.

It is an interprime number because it is at equal distance from previous prime (134420399) and next prime (134420443).

It is not a de Polignac number, because 134420421 - 2⁶ = 134420357 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134427421) 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 15 ways as a sum of consecutive naturals, for example, 48645 + ... + 51333.

It is an arithmetic number, because the mean of its divisors is an integer number (11809100).

Almost surely, 2^134420421 is an apocalyptic number.

It is an amenable number.

134420421 is a deficient number, since it is larger than the sum of its proper divisors (54525179).

134420421 is a wasteful number, since it uses less digits than its factorization.

134420421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3588.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 134420421 is about 11593.9821027980. The cubic root of 134420421 is about 512.2576078430.

Adding to 134420421 its reverse (124024431), we get a palindrome (258444852).

The spelling of 134420421 in words is "one hundred thirty-four million, four hundred twenty thousand, four hundred twenty-one".