136512720 has 240 divisors, whose sum is σ = 511842240. Its totient is φ = 32403456.

The previous prime is 136512709. The next prime is 136512731. The reversal of 136512720 is 27215631.

It is a happy number.

136512720 is a `hidden beast` number, since 1 + 3 + 651 + 2 + 7 + 2 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (136512709) and next prime (136512731).

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

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, 232267 + ... + 232853.

It is an arithmetic number, because the mean of its divisors is an integer number (2132676).

Almost surely, 2^136512720 is an apocalyptic number.

136512720 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 136512720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255921120).

136512720 is an abundant number, since it is smaller than the sum of its proper divisors (375329520).

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

136512720 is a wasteful number, since it uses less digits than its factorization.

136512720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642 (or 633 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 136512720 is about 11683.8657986131. The cubic root of 136512720 is about 514.9017564821.

The spelling of 136512720 in words is "one hundred thirty-six million, five hundred twelve thousand, seven hundred twenty".