135281502 has 48 divisors (see below), whose sum is σ = 305912880. Its totient is φ = 44805312.

The previous prime is 135281467. The next prime is 135281519. The reversal of 135281502 is 205182531.

It is a happy number.

135281502 is a `hidden beast` number, since 135 + 28 + 1 + 502 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83274 + ... + 84882.

It is an arithmetic number, because the mean of its divisors is an integer number (6373185).

Almost surely, 2^135281502 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135281502, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (152956440).

135281502 is an abundant number, since it is smaller than the sum of its proper divisors (170631378).

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

135281502 is a wasteful number, since it uses less digits than its factorization.

135281502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1799 (or 1787 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 135281502 is about 11631.0576475229. The cubic root of 135281502 is about 513.3491006382.

The spelling of 135281502 in words is "one hundred thirty-five million, two hundred eighty-one thousand, five hundred two".