134591243 has 4 divisors (see below), whose sum is σ = 138932928. Its totient is φ = 130249560.

The previous prime is 134591209. The next prime is 134591257. The reversal of 134591243 is 342195431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342195431 = 17 ⋅20129143.

It is a cyclic number.

It is not a de Polignac number, because 134591243 - 2¹⁸ = 134329099 is a prime.

It is a super-2 number, since 2×134591243² = 36229605384570098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134591293) 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, 2170796 + ... + 2170857.

It is an arithmetic number, because the mean of its divisors is an integer number (34733232).

Almost surely, 2^134591243 is an apocalyptic number.

134591243 is a deficient number, since it is larger than the sum of its proper divisors (4341685).

134591243 is an equidigital number, since it uses as much as digits as its factorization.

134591243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4341684.

The product of its digits is 12960, while the sum is 32.

The square root of 134591243 is about 11601.3466028733. The cubic root of 134591243 is about 512.4745089840.

The spelling of 134591243 in words is "one hundred thirty-four million, five hundred ninety-one thousand, two hundred forty-three".