134340247 has 4 divisors (see below), whose sum is σ = 135725296. Its totient is φ = 132955200.

The previous prime is 134340223. The next prime is 134340253. The reversal of 134340247 is 742043431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 742043431 = 23057 ⋅32183.

It is a cyclic number.

It is not a de Polignac number, because 134340247 - 2¹⁵ = 134307479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (134340277) 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, 692379 + ... + 692572.

It is an arithmetic number, because the mean of its divisors is an integer number (33931324).

Almost surely, 2^134340247 is an apocalyptic number.

134340247 is a deficient number, since it is larger than the sum of its proper divisors (1385049).

134340247 is an equidigital number, since it uses as much as digits as its factorization.

134340247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1385048.

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 134340247 is about 11590.5240174895. The cubic root of 134340247 is about 512.1557435848.

Adding to 134340247 its reverse (742043431), we get a palindrome (876383678).

The spelling of 134340247 in words is "one hundred thirty-four million, three hundred forty thousand, two hundred forty-seven".