134431243 has 4 divisors (see below), whose sum is σ = 134909928. Its totient is φ = 133952560.

The previous prime is 134431237. The next prime is 134431259. The reversal of 134431243 is 342134431.

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

It is a cyclic number.

It is not a de Polignac number, because 134431243 - 2¹⁷ = 134300171 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134431273) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 238921 + ... + 239482.

It is an arithmetic number, because the mean of its divisors is an integer number (33727482).

Almost surely, 2^134431243 is an apocalyptic number.

134431243 is a deficient number, since it is larger than the sum of its proper divisors (478685).

134431243 is an equidigital number, since it uses as much as digits as its factorization.

134431243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478684.

The product of its digits is 3456, while the sum is 25.

The square root of 134431243 is about 11594.4488010427. The cubic root of 134431243 is about 512.2713545218.

Adding to 134431243 its reverse (342134431), we get a palindrome (476565674).

The spelling of 134431243 in words is "one hundred thirty-four million, four hundred thirty-one thousand, two hundred forty-three".