128612 has 24 divisors (see below), whose sum is σ = 255360. Its totient is φ = 56160.

The previous prime is 128603. The next prime is 128621. The reversal of 128612 is 216821.

It is an interprime number because it is at equal distance from previous prime (128603) and next prime (128621).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1589 + ... + 1667.

It is an arithmetic number, because the mean of its divisors is an integer number (10640).

2¹²⁸⁶¹² is an apocalyptic number.

It is an amenable number.

128612 is a deficient number, since it is larger than the sum of its proper divisors (126748).

128612 is a wasteful number, since it uses less digits than its factorization.

128612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131 (or 129 counting only the distinct ones).

The product of its digits is 192, while the sum is 20.

The square root of 128612 is about 358.6251524921. The cubic root of 128612 is about 50.4770342917.

Subtracting 128612 from its reverse (216821), we obtain a square (88209 = 297²).

The spelling of 128612 in words is "one hundred twenty-eight thousand, six hundred twelve".