135167021 has 16 divisors (see below), whose sum is σ = 154604160. Its totient is φ = 116973120.

The previous prime is 135166981. The next prime is 135167023. The reversal of 135167021 is 120761531.

It is a de Polignac number, because none of the positive numbers 2^k-135167021 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135167023) 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 15 ways as a sum of consecutive naturals, for example, 56771 + ... + 59103.

It is an arithmetic number, because the mean of its divisors is an integer number (9662760).

Almost surely, 2^135167021 is an apocalyptic number.

135167021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

135167021 is a deficient number, since it is larger than the sum of its proper divisors (19437139).

135167021 is a wasteful number, since it uses less digits than its factorization.

135167021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2596.

The product of its (nonzero) digits is 1260, while the sum is 26.

The square root of 135167021 is about 11626.1352563954. The cubic root of 135167021 is about 513.2042537748.

The spelling of 135167021 in words is "one hundred thirty-five million, one hundred sixty-seven thousand, twenty-one".