135020671 has 4 divisors (see below), whose sum is σ = 135927000. Its totient is φ = 134114344.

The previous prime is 135020653. The next prime is 135020687. The reversal of 135020671 is 176020531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 176020531 = 2917 ⋅60343.

It is a cyclic number.

It is not a de Polignac number, because 135020671 - 2²³ = 126632063 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 (135020651) 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, 452941 + ... + 453238.

It is an arithmetic number, because the mean of its divisors is an integer number (33981750).

Almost surely, 2^135020671 is an apocalyptic number.

135020671 is a deficient number, since it is larger than the sum of its proper divisors (906329).

135020671 is an equidigital number, since it uses as much as digits as its factorization.

135020671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906328.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 135020671 is about 11619.8395427820. The cubic root of 135020671 is about 513.0189655651.

The spelling of 135020671 in words is "one hundred thirty-five million, twenty thousand, six hundred seventy-one".