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155128 = 2319391
BaseRepresentation
bin100101110111111000
321212210111
4211313320
514431003
63154104
71214161
oct456770
9255714
10155128
11a6606
1275934
13557bc
1440768
1530e6d
hex25df8

155128 has 8 divisors (see below), whose sum is σ = 290880. Its totient is φ = 77560.

The previous prime is 155119. The next prime is 155137. The reversal of 155128 is 821551.

It is an interprime number because it is at equal distance from previous prime (155119) and next prime (155137).

It is a tau number, because it is divible by the number of its divisors (8).

It is a plaindrome in base 13.

It is a junction number, because it is equal to n+sod(n) for n = 155099 and 155108.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 9688 + ... + 9703.

It is an arithmetic number, because the mean of its divisors is an integer number (36360).

2155128 is an apocalyptic number.

It is an amenable number.

155128 is a deficient number, since it is larger than the sum of its proper divisors (135752).

155128 is a wasteful number, since it uses less digits than its factorization.

155128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19397 (or 19393 counting only the distinct ones).

The product of its digits is 400, while the sum is 22.

The square root of 155128 is about 393.8629203162. The cubic root of 155128 is about 53.7316360558.

Adding to 155128 its reverse (821551), we get a palindrome (976679).

The spelling of 155128 in words is "one hundred fifty-five thousand, one hundred twenty-eight".

Divisors: 1 2 4 8 19391 38782 77564 155128