134621243 has 4 divisors (see below), whose sum is σ = 134825568. Its totient is φ = 134416920.

The previous prime is 134621239. The next prime is 134621257. The reversal of 134621243 is 342126431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 342126431 = 293 ⋅1167667.

It is a cyclic number.

It is not a de Polignac number, because 134621243 - 2² = 134621239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134621273) 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, 101171 + ... + 102492.

It is an arithmetic number, because the mean of its divisors is an integer number (33706392).

Almost surely, 2^134621243 is an apocalyptic number.

134621243 is a deficient number, since it is larger than the sum of its proper divisors (204325).

134621243 is an equidigital number, since it uses as much as digits as its factorization.

134621243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204324.

The product of its digits is 3456, while the sum is 26.

The square root of 134621243 is about 11602.6394841863. The cubic root of 134621243 is about 512.5125825188.

Adding to 134621243 its reverse (342126431), we get a palindrome (476747674).

The spelling of 134621243 in words is "one hundred thirty-four million, six hundred twenty-one thousand, two hundred forty-three".