128481487 has 8 divisors (see below), whose sum is σ = 131537520. Its totient is φ = 125448960.

The previous prime is 128481481. The next prime is 128481499. The reversal of 128481487 is 784184821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128481487 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128481481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5439 + ... + 16927.

It is an arithmetic number, because the mean of its divisors is an integer number (16442190).

Almost surely, 2^128481487 is an apocalyptic number.

128481487 is a deficient number, since it is larger than the sum of its proper divisors (3056033).

128481487 is a wasteful number, since it uses less digits than its factorization.

128481487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11753.

The product of its digits is 114688, while the sum is 43.

The square root of 128481487 is about 11334.9674459171. The cubic root of 128481487 is about 504.5995413627.

The spelling of 128481487 in words is "one hundred twenty-eight million, four hundred eighty-one thousand, four hundred eighty-seven".