136721152 has 36 divisors (see below), whose sum is σ = 274394736. Its totient is φ = 67988480.

The previous prime is 136721119. The next prime is 136721153. The reversal of 136721152 is 251127631.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 136721152.

It is not an unprimeable number, because it can be changed into a prime (136721153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49077 + ... + 51787.

It is an arithmetic number, because the mean of its divisors is an integer number (7622076).

Almost surely, 2^136721152 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 136721152, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (137197368).

136721152 is an abundant number, since it is smaller than the sum of its proper divisors (137673584).

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

136721152 is an equidigital number, since it uses as much as digits as its factorization.

136721152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2924 (or 2910 counting only the distinct ones).

The product of its digits is 2520, while the sum is 28.

The square root of 136721152 is about 11692.7820470579. The cubic root of 136721152 is about 515.1636793962.

Adding to 136721152 its reverse (251127631), we get a palindrome (387848783).

The spelling of 136721152 in words is "one hundred thirty-six million, seven hundred twenty-one thousand, one hundred fifty-two".