134637421 has 4 divisors (see below), whose sum is σ = 134856252. Its totient is φ = 134418592.

The previous prime is 134637403. The next prime is 134637427. The reversal of 134637421 is 124736431.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 60918025 + 73719396 = 7805^2 + 8586^2 .

It is a cyclic number.

It is not a de Polignac number, because 134637421 - 2¹⁵ = 134604653 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134637427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 108490 + ... + 109723.

It is an arithmetic number, because the mean of its divisors is an integer number (33714063).

Almost surely, 2^134637421 is an apocalyptic number.

It is an amenable number.

134637421 is a deficient number, since it is larger than the sum of its proper divisors (218831).

134637421 is an equidigital number, since it uses as much as digits as its factorization.

134637421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218830.

The product of its digits is 12096, while the sum is 31.

The square root of 134637421 is about 11603.3366321933. The cubic root of 134637421 is about 512.5331119594.

The spelling of 134637421 in words is "one hundred thirty-four million, six hundred thirty-seven thousand, four hundred twenty-one".