135161280 has 168 divisors, whose sum is σ = 472159584. Its totient is φ = 35481600.

The previous prime is 135161263. The next prime is 135161287. The reversal of 135161280 is 82161531.

It is a super-2 number, since 2×135161280² = 36537143222476800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135161287) 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, 204150 + ... + 204810.

Almost surely, 2^135161280 is an apocalyptic number.

135161280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135161280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236079792).

135161280 is an abundant number, since it is smaller than the sum of its proper divisors (336998304).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

135161280 is a wasteful number, since it uses less digits than its factorization.

135161280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755 (or 742 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 135161280 is about 11625.8883531539. Note that the first 3 decimals coincide. The cubic root of 135161280 is about 513.1969878325.

The spelling of 135161280 in words is "one hundred thirty-five million, one hundred sixty-one thousand, two hundred eighty".