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4155 = 35277
BaseRepresentation
bin1000000111011
312200220
41000323
5113110
631123
715054
oct10073
95626
104155
113138
1224a3
131b78
14172b
151370
hex103b

4155 has 8 divisors (see below), whose sum is σ = 6672. Its totient is φ = 2208.

The previous prime is 4153. The next prime is 4157. The reversal of 4155 is 5514.

It is an interprime number because it is at equal distance from previous prime (4153) and next prime (4157).

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

It is not a de Polignac number, because 4155 - 21 = 4153 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (15), and also a Moran number because the ratio is a prime number: 277 = 4155 / (4 + 1 + 5 + 5).

It is an Ulam number.

It is a d-powerful number, because it can be written as 45 + 5 + 1 + 55 .

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 4155.

It is not an unprimeable number, because it can be changed into a prime (4153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 124 + ... + 153.

It is an arithmetic number, because the mean of its divisors is an integer number (834).

24155 is an apocalyptic number.

4155 is a deficient number, since it is larger than the sum of its proper divisors (2517).

4155 is a wasteful number, since it uses less digits than its factorization.

4155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285.

The product of its digits is 100, while the sum is 15.

The square root of 4155 is about 64.4592894779. The cubic root of 4155 is about 16.0764569803.

Adding to 4155 its reverse (5514), we get a palindrome (9669).

The spelling of 4155 in words is "four thousand, one hundred fifty-five".

Divisors: 1 3 5 15 277 831 1385 4155