135021544 has 32 divisors (see below), whose sum is σ = 292593600. Its totient is φ = 57214080.

The previous prime is 135021541. The next prime is 135021571. The reversal of 135021544 is 445120531.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (135021541) 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, 8562 + ... + 18529.

It is an arithmetic number, because the mean of its divisors is an integer number (9143550).

Almost surely, 2^135021544 is an apocalyptic number.

135021544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

135021544 is an abundant number, since it is smaller than the sum of its proper divisors (157572056).

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

135021544 is a wasteful number, since it uses less digits than its factorization.

135021544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27193 (or 27189 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 25.

The square root of 135021544 is about 11619.8771077839. The cubic root of 135021544 is about 513.0200712343.

The spelling of 135021544 in words is "one hundred thirty-five million, twenty-one thousand, five hundred forty-four".