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128274 = 2321379
BaseRepresentation
bin11111010100010010
320111221220
4133110102
513101044
62425510
71042656
oct372422
9214856
10128274
1188413
1262296
1346503
1434a66
1528019
hex1f512

128274 has 8 divisors (see below), whose sum is σ = 256560. Its totient is φ = 42756.

The previous prime is 128273. The next prime is 128287. The reversal of 128274 is 472821.

It is a sphenic number, since it is the product of 3 distinct primes.

128274 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (128273) 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, 10684 + ... + 10695.

It is an arithmetic number, because the mean of its divisors is an integer number (32070).

2128274 is an apocalyptic number.

128274 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

128274 is a wasteful number, since it uses less digits than its factorization.

128274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21384.

The product of its digits is 896, while the sum is 24.

The square root of 128274 is about 358.1535983346. The cubic root of 128274 is about 50.4327766138.

The spelling of 128274 in words is "one hundred twenty-eight thousand, two hundred seventy-four".

Divisors: 1 2 3 6 21379 42758 64137 128274