128970 has 24 divisors (see below), whose sum is σ = 335556. Its totient is φ = 34368.

The previous prime is 128969. The next prime is 128971. The reversal of 128970 is 79821.

It is an interprime number because it is at equal distance from previous prime (128969) and next prime (128971).

It can be written as a sum of positive squares in 2 ways, for example, as 127449 + 1521 = 357^2 + 39^2 .

It is not an unprimeable number, because it can be changed into a prime (128971) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 627 + ... + 806.

2¹²⁸⁹⁷⁰ is an apocalyptic number.

128970 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

128970 is an abundant number, since it is smaller than the sum of its proper divisors (206586).

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

128970 is a wasteful number, since it uses less digits than its factorization.

128970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1446 (or 1443 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 27.

The square root of 128970 is about 359.1239340395. The cubic root of 128970 is about 50.5238262891.

The spelling of 128970 in words is "one hundred twenty-eight thousand, nine hundred seventy".