135784121 has 8 divisors (see below), whose sum is σ = 148228704. Its totient is φ = 123356320.

The previous prime is 135784027. The next prime is 135784133. The reversal of 135784121 is 121487531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135784121 - 2²² = 131589817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135786121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17741 + ... + 24213.

It is an arithmetic number, because the mean of its divisors is an integer number (18528588).

Almost surely, 2^135784121 is an apocalyptic number.

135784121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

135784121 is a deficient number, since it is larger than the sum of its proper divisors (12444583).

135784121 is a wasteful number, since it uses less digits than its factorization.

135784121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8391.

The product of its digits is 6720, while the sum is 32.

The square root of 135784121 is about 11652.6443779942. The cubic root of 135784121 is about 513.9840731993.

The spelling of 135784121 in words is "one hundred thirty-five million, seven hundred eighty-four thousand, one hundred twenty-one".