135621100 has 36 divisors (see below), whose sum is σ = 295864744. Its totient is φ = 53959680.

The previous prime is 135621077. The next prime is 135621149. The reversal of 135621100 is 1126531.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15787 + ... + 22813.

Almost surely, 2^135621100 is an apocalyptic number.

135621100 is a gapful number since it is divisible by the number (10) 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 135621100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (147932372).

135621100 is an abundant number, since it is smaller than the sum of its proper divisors (160243644).

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

135621100 is a wasteful number, since it uses less digits than its factorization.

135621100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7234 (or 7227 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 135621100 is about 11645.6472555200. The cubic root of 135621100 is about 513.7782961862.

Adding to 135621100 its reverse (1126531), we get a palindrome (136747631).

The spelling of 135621100 in words is "one hundred thirty-five million, six hundred twenty-one thousand, one hundred".