135252240 has 40 divisors (see below), whose sum is σ = 419282688. Its totient is φ = 36067200.

The previous prime is 135252233. The next prime is 135252263. The reversal of 135252240 is 42252531.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 135252240.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281536 + ... + 282015.

Almost surely, 2^135252240 is an apocalyptic number.

135252240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135252240 is an abundant number, since it is smaller than the sum of its proper divisors (284030448).

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

135252240 is a wasteful number, since it uses less digits than its factorization.

135252240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563567 (or 563561 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 24.

The square root of 135252240 is about 11629.7996543363. The cubic root of 135252240 is about 513.3120847261.

The spelling of 135252240 in words is "one hundred thirty-five million, two hundred fifty-two thousand, two hundred forty".