135751409 has 24 divisors (see below), whose sum is σ = 156008160. Its totient is φ = 117386496.

The previous prime is 135751337. The next prime is 135751417. The reversal of 135751409 is 904157531.

135751409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a de Polignac number, because none of the positive numbers 2^k-135751409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (135751439) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 442034 + ... + 442340.

It is an arithmetic number, because the mean of its divisors is an integer number (6500340).

Almost surely, 2^135751409 is an apocalyptic number.

135751409 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

135751409 is a deficient number, since it is larger than the sum of its proper divisors (20256751).

135751409 is a wasteful number, since it uses less digits than its factorization.

135751409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417 (or 380 counting only the distinct ones).

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 135751409 is about 11651.2406635517. The cubic root of 135751409 is about 513.9427949377.

The spelling of 135751409 in words is "one hundred thirty-five million, seven hundred fifty-one thousand, four hundred nine".