135721014 has 64 divisors (see below), whose sum is σ = 320544000. Its totient is φ = 37768320.

The previous prime is 135720997. The next prime is 135721031. The reversal of 135721014 is 410127531.

It is an interprime number because it is at equal distance from previous prime (135720997) and next prime (135721031).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 271737 + ... + 272235.

It is an arithmetic number, because the mean of its divisors is an integer number (5008500).

Almost surely, 2^135721014 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 135721014, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (160272000).

135721014 is an abundant number, since it is smaller than the sum of its proper divisors (184822986).

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

135721014 is a wasteful number, since it uses less digits than its factorization.

135721014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845.

The product of its (nonzero) digits is 840, while the sum is 24.

The square root of 135721014 is about 11649.9362230014. The cubic root of 135721014 is about 513.9044344832.

Adding to 135721014 its reverse (410127531), we get a palindrome (545848545).

The spelling of 135721014 in words is "one hundred thirty-five million, seven hundred twenty-one thousand, fourteen".