128261050 has 12 divisors (see below), whose sum is σ = 238565646. Its totient is φ = 51304400.

The previous prime is 128261047. The next prime is 128261051. The reversal of 128261050 is 50162821.

It can be written as a sum of positive squares in 3 ways, for example, as 96687889 + 31573161 = 9833^2 + 5619^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (128261051) 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, 1282561 + ... + 1282660.

Almost surely, 2^128261050 is an apocalyptic number.

128261050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128261050 is a deficient number, since it is larger than the sum of its proper divisors (110304596).

128261050 is a wasteful number, since it uses less digits than its factorization.

128261050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2565233 (or 2565228 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 128261050 is about 11325.2395118161. The cubic root of 128261050 is about 504.3107939677.

The spelling of 128261050 in words is "one hundred twenty-eight million, two hundred sixty-one thousand, fifty".