Search a number
-
+
1131505 = 5972333
BaseRepresentation
bin100010100001111110001
32010111010121
410110033301
5242202010
640130241
712421564
oct4241761
92114117
101131505
11703131
12466981
1330803b
142164db
151753da
hex1143f1

1131505 has 8 divisors (see below), whose sum is σ = 1372392. Its totient is φ = 895488.

The previous prime is 1131491. The next prime is 1131509. The reversal of 1131505 is 5051311.

It can be written as a sum of positive squares in 4 ways, for example, as 51984 + 1079521 = 228^2 + 1039^2 .

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 1131505 - 215 = 1098737 is a prime.

It is a Duffinian number.

1131505 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131509) 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, 682 + ... + 1651.

It is an arithmetic number, because the mean of its divisors is an integer number (171549).

21131505 is an apocalyptic number.

It is an amenable number.

1131505 is a deficient number, since it is larger than the sum of its proper divisors (240887).

1131505 is an equidigital number, since it uses as much as digits as its factorization.

1131505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2435.

The product of its (nonzero) digits is 75, while the sum is 16.

The square root of 1131505 is about 1063.7222381806. The cubic root of 1131505 is about 104.2042644723.

Adding to 1131505 its reverse (5051311), we get a palindrome (6182816).

The spelling of 1131505 in words is "one million, one hundred thirty-one thousand, five hundred five".

Divisors: 1 5 97 485 2333 11665 226301 1131505