135076021 has 12 divisors (see below), whose sum is σ = 141877632. Its totient is φ = 128466000.

The previous prime is 135076001. The next prime is 135076031. The reversal of 135076021 is 120670531.

It is not a de Polignac number, because 135076021 - 2¹¹ = 135073973 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 (135076001) 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 11 ways as a sum of consecutive naturals, for example, 114766 + ... + 115936.

It is an arithmetic number, because the mean of its divisors is an integer number (11823136).

Almost surely, 2^135076021 is an apocalyptic number.

It is an amenable number.

135076021 is a deficient number, since it is larger than the sum of its proper divisors (6801611).

135076021 is an equidigital number, since it uses as much as digits as its factorization.

135076021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324 (or 1263 counting only the distinct ones).

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

The square root of 135076021 is about 11622.2210011684. The cubic root of 135076021 is about 513.0890578463.

The spelling of 135076021 in words is "one hundred thirty-five million, seventy-six thousand, twenty-one".