Search a number
-
+
1388143 = 29151317
BaseRepresentation
bin101010010111001101111
32121112011201
411102321233
5323410033
645430331
714541031
oct5227157
92545151
101388143
11868a29
1256b3a7
13397ab3
14281c51
151c647d
hex152e6f

1388143 has 8 divisors (see below), whose sum is σ = 1450080. Its totient is φ = 1327200.

The previous prime is 1388141. The next prime is 1388161. The reversal of 1388143 is 3418831.

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 1388143 - 21 = 1388141 is a prime.

It is a Duffinian number.

1388143 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4221 + ... + 4537.

It is an arithmetic number, because the mean of its divisors is an integer number (181260).

21388143 is an apocalyptic number.

1388143 is a deficient number, since it is larger than the sum of its proper divisors (61937).

1388143 is a wasteful number, since it uses less digits than its factorization.

1388143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497.

The product of its digits is 2304, while the sum is 28.

The square root of 1388143 is about 1178.1948056243. The cubic root of 1388143 is about 111.5521818666.

It can be divided in two parts, 13881 and 43, that added together give a square (13924 = 1182).

The spelling of 1388143 in words is "one million, three hundred eighty-eight thousand, one hundred forty-three".

Divisors: 1 29 151 317 4379 9193 47867 1388143