135981450 has 96 divisors (see below), whose sum is σ = 408813120. Its totient is φ = 32961600.

The previous prime is 135981427. The next prime is 135981491. The reversal of 135981450 is 54189531.

135981450 is a `hidden beast` number, since 1 + 3 + 598 + 14 + 50 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 10272 + ... + 19428.

It is an arithmetic number, because the mean of its divisors is an integer number (4258470).

Almost surely, 2^135981450 is an apocalyptic number.

135981450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 135981450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (204406560).

135981450 is an abundant number, since it is smaller than the sum of its proper divisors (272831670).

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

135981450 is a wasteful number, since it uses less digits than its factorization.

135981450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9189 (or 9178 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 135981450 is about 11661.1084378802. The cubic root of 135981450 is about 514.2329360521.

The spelling of 135981450 in words is "one hundred thirty-five million, nine hundred eighty-one thousand, four hundred fifty".