134212421 has 12 divisors (see below), whose sum is σ = 156352140. Its totient is φ = 114871680.

The previous prime is 134212387. The next prime is 134212451. The reversal of 134212421 is 124212431.

It can be written as a sum of positive squares in 2 ways, for example, as 23668225 + 110544196 = 4865^2 + 10514^2 .

It is not a de Polignac number, because 134212421 - 2¹⁰ = 134211397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 134212393 and 134212402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134212451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 41615 + ... + 44723.

It is an arithmetic number, because the mean of its divisors is an integer number (13029345).

Almost surely, 2^134212421 is an apocalyptic number.

It is an amenable number.

134212421 is a deficient number, since it is larger than the sum of its proper divisors (22139719).

134212421 is an equidigital number, since it uses as much as digits as its factorization.

134212421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4004 (or 3997 counting only the distinct ones).

The product of its digits is 384, while the sum is 20.

The square root of 134212421 is about 11585.0084592114. The cubic root of 134212421 is about 511.9932517116.

Adding to 134212421 its reverse (124212431), we get a palindrome (258424852).

The spelling of 134212421 in words is "one hundred thirty-four million, two hundred twelve thousand, four hundred twenty-one".