134642251 has 4 divisors (see below), whose sum is σ = 134672832. Its totient is φ = 134611672.

The previous prime is 134642243. The next prime is 134642279. The reversal of 134642251 is 152246431.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 152246431 = 389 ⋅391379.

It is a cyclic number.

It is not a de Polignac number, because 134642251 - 2³ = 134642243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (134642231) 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, 7291 + ... + 17956.

It is an arithmetic number, because the mean of its divisors is an integer number (33668208).

Almost surely, 2^134642251 is an apocalyptic number.

134642251 is a deficient number, since it is larger than the sum of its proper divisors (30581).

134642251 is an equidigital number, since it uses as much as digits as its factorization.

134642251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30580.

The product of its digits is 5760, while the sum is 28.

The square root of 134642251 is about 11603.5447601153. The cubic root of 134642251 is about 512.5392407788.

Adding to 134642251 its reverse (152246431), we get a palindrome (286888682).

The spelling of 134642251 in words is "one hundred thirty-four million, six hundred forty-two thousand, two hundred fifty-one".