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128292 = 22310691

128292 has 12 divisors (see below), whose sum is σ = 299376. Its totient is φ = 42760.

The previous prime is 128291. The next prime is 128311. The reversal of 128292 is 292821.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors.

It is an Ulam number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 128292.

It is not an unprimeable number, because it can be changed into a prime (128291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5334 + ... + 5357.

It is an arithmetic number, because the mean of its divisors is an integer number (24948).

2128292 is an apocalyptic number.

128292 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

128292 is an abundant number, since it is smaller than the sum of its proper divisors (171084).

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

128292 is a wasteful number, since it uses less digits than its factorization.

128292 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10698 (or 10696 counting only the distinct ones).

The product of its digits is 576, while the sum is 24.

The square root of 128292 is about 358.1787263364. The cubic root of 128292 is about 50.4351354901.

The spelling of 128292 in words is "one hundred twenty-eight thousand, two hundred ninety-two".

Divisors: 1 2 3 4 6 12 10691 21382 32073 42764 64146 128292