135172872 has 24 divisors (see below), whose sum is σ = 366093390. Its totient is φ = 45057600.

The previous prime is 135172847. The next prime is 135172883. The reversal of 135172872 is 278271531.

It can be written as a sum of positive squares in only one way, i.e., 90897156 + 44275716 = 9534^2 + 6654^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 938629 + ... + 938772.

Almost surely, 2^135172872 is an apocalyptic number.

135172872 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

135172872 is an abundant number, since it is smaller than the sum of its proper divisors (230920518).

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

135172872 is a wasteful number, since it uses less digits than its factorization.

135172872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1877413 (or 1877406 counting only the distinct ones).

The product of its digits is 23520, while the sum is 36.

The square root of 135172872 is about 11626.3868850129. The cubic root of 135172872 is about 513.2116587240.

The spelling of 135172872 in words is "one hundred thirty-five million, one hundred seventy-two thousand, eight hundred seventy-two".