134402421 has 4 divisors (see below), whose sum is σ = 179203232. Its totient is φ = 89601612.

The previous prime is 134402399. The next prime is 134402423. The reversal of 134402421 is 124204431.

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 not a de Polignac number, because 134402421 - 2⁷ = 134402293 is a prime.

It is a super-2 number, since 2×134402421² = 36128021541322482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134402423) 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, 22400401 + ... + 22400406.

It is an arithmetic number, because the mean of its divisors is an integer number (44800808).

Almost surely, 2^134402421 is an apocalyptic number.

It is an amenable number.

134402421 is a deficient number, since it is larger than the sum of its proper divisors (44800811).

134402421 is an equidigital number, since it uses as much as digits as its factorization.

134402421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44800810.

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

The square root of 134402421 is about 11593.2058120263. The cubic root of 134402421 is about 512.2347416533.

Adding to 134402421 its reverse (124204431), we get a palindrome (258606852).

The spelling of 134402421 in words is "one hundred thirty-four million, four hundred two thousand, four hundred twenty-one".