135131304 has 128 divisors (see below), whose sum is σ = 426746880. Its totient is φ = 34636800.

The previous prime is 135131303. The next prime is 135131341. The reversal of 135131304 is 403131531.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (135131303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 152944 + ... + 153824.

It is an arithmetic number, because the mean of its divisors is an integer number (3333960).

Almost surely, 2^135131304 is an apocalyptic number.

135131304 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135131304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213373440).

135131304 is an abundant number, since it is smaller than the sum of its proper divisors (291615576).

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

135131304 is a wasteful number, since it uses less digits than its factorization.

135131304 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 991 (or 987 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 21.

The square root of 135131304 is about 11624.5990898611. The cubic root of 135131304 is about 513.1590461717.

Adding to 135131304 its reverse (403131531), we get a palindrome (538262835).

The spelling of 135131304 in words is "one hundred thirty-five million, one hundred thirty-one thousand, three hundred four".