128137156 has 18 divisors (see below), whose sum is σ = 260851038. Its totient is φ = 54915840.

The previous prime is 128137151. The next prime is 128137157. The reversal of 128137156 is 651731821.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 75342400 + 52794756 = 8680^2 + 7266^2 .

It is not an unprimeable number, because it can be changed into a prime (128137151) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 326685 + ... + 327076.

Almost surely, 2^128137156 is an apocalyptic number.

It is an amenable number.

128137156 is an abundant number, since it is smaller than the sum of its proper divisors (132713882).

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

128137156 is a wasteful number, since it uses less digits than its factorization.

128137156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 653779 (or 653770 counting only the distinct ones).

The product of its digits is 10080, while the sum is 34.

The square root of 128137156 is about 11319.7683721885. The cubic root of 128137156 is about 504.1483616725.

Adding to 128137156 its reverse (651731821), we get a palindrome (779868977).

The spelling of 128137156 in words is "one hundred twenty-eight million, one hundred thirty-seven thousand, one hundred fifty-six".