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128151 = 3229491
BaseRepresentation
bin11111010010010111
320111210100
4133102113
513100101
62425143
71042422
oct372227
9214710
10128151
1188311
12621b3
134643a
14349b9
1527e86
hex1f497

128151 has 12 divisors (see below), whose sum is σ = 191880. Its totient is φ = 82320.

The previous prime is 128147. The next prime is 128153. The reversal of 128151 is 151821.

It is not a de Polignac number, because 128151 - 22 = 128147 is a prime.

It is a nialpdrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16 + ... + 506.

It is an arithmetic number, because the mean of its divisors is an integer number (15990).

2128151 is an apocalyptic number.

128151 is a deficient number, since it is larger than the sum of its proper divisors (63729).

128151 is a wasteful number, since it uses less digits than its factorization.

128151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526 (or 523 counting only the distinct ones).

The product of its digits is 80, while the sum is 18.

The square root of 128151 is about 357.9818431150. The cubic root of 128151 is about 50.4166517163.

Adding to 128151 its reverse (151821), we get a palindrome (279972).

The spelling of 128151 in words is "one hundred twenty-eight thousand, one hundred fifty-one".

Divisors: 1 3 9 29 87 261 491 1473 4419 14239 42717 128151