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1955 = 51723
BaseRepresentation
bin11110100011
32200102
4132203
530310
613015
75462
oct3643
92612
101955
111518
12116b
13b75
149d9
158a5
hex7a3

1955 has 8 divisors (see below), whose sum is σ = 2592. Its totient is φ = 1408.

The previous prime is 1951. The next prime is 1973. The reversal of 1955 is 5591.

1955 is nontrivially palindromic in base 14.

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

It is a cyclic number.

It is not a de Polignac number, because 1955 - 22 = 1951 is a prime.

It is a Duffinian number.

1955 is an undulating number in base 14.

Its product of digits (225) is a multiple of the sum of its prime divisors (45).

It is a plaindrome in base 12.

It is a nialpdrome in base 13.

It is not an unprimeable number, because it can be changed into a prime (1951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 74 + ... + 96.

It is an arithmetic number, because the mean of its divisors is an integer number (324).

1955 is a deficient number, since it is larger than the sum of its proper divisors (637).

1955 is a wasteful number, since it uses less digits than its factorization.

1955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45.

The product of its digits is 225, while the sum is 20.

The square root of 1955 is about 44.2153819389. The cubic root of 1955 is about 12.5039987207.

The spelling of 1955 in words is "one thousand, nine hundred fifty-five".

Divisors: 1 5 17 23 85 115 391 1955