135849520 has 20 divisors (see below), whose sum is σ = 315850320. Its totient is φ = 54339776.

The previous prime is 135849473. The next prime is 135849529. The reversal of 135849520 is 25948531.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 135849520.

It is not an unprimeable number, because it can be changed into a prime (135849529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 848980 + ... + 849139.

It is an arithmetic number, because the mean of its divisors is an integer number (15792516).

Almost surely, 2^135849520 is an apocalyptic number.

135849520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

135849520 is an abundant number, since it is smaller than the sum of its proper divisors (180000800).

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

135849520 is a wasteful number, since it uses less digits than its factorization.

135849520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1698132 (or 1698126 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 135849520 is about 11655.4502272542. The cubic root of 135849520 is about 514.0665783036.

It can be divided in two parts, 13584 and 9520, that added together give a square (23104 = 152²).

The spelling of 135849520 in words is "one hundred thirty-five million, eight hundred forty-nine thousand, five hundred twenty".