128061250 has 40 divisors (see below), whose sum is σ = 244693548. Its totient is φ = 50232000.

The previous prime is 128061247. The next prime is 128061253. The reversal of 128061250 is 52160821.

It is an interprime number because it is at equal distance from previous prime (128061247) and next prime (128061253).

It can be written as a sum of positive squares in 10 ways, for example, as 755161 + 127306089 = 869^2 + 11283^2 .

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 (128061253) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 65284 + ... + 67216.

Almost surely, 2^128061250 is an apocalyptic number.

128061250 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128061250 is a deficient number, since it is larger than the sum of its proper divisors (116632298).

128061250 is an equidigital number, since it uses as much as digits as its factorization.

128061250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2008 (or 1993 counting only the distinct ones).

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

The square root of 128061250 is about 11316.4150683863. The cubic root of 128061250 is about 504.0487927273.

The spelling of 128061250 in words is "one hundred twenty-eight million, sixty-one thousand, two hundred fifty".