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1131812 = 221129887
BaseRepresentation
bin100010100010100100100
32010111112222
410110110210
5242204222
640131512
712422513
oct4242444
92114488
101131812
11703390
12466b98
13308216
1421667a
15175542
hex114524

1131812 has 24 divisors (see below), whose sum is σ = 2237760. Its totient is φ = 496160.

The previous prime is 1131799. The next prime is 1131821. The reversal of 1131812 is 2181311.

It is an unprimeable number.

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, 833 + ... + 1719.

It is an arithmetic number, because the mean of its divisors is an integer number (93240).

21131812 is an apocalyptic number.

It is an amenable number.

1131812 is a deficient number, since it is larger than the sum of its proper divisors (1105948).

1131812 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (1131811) it forms a Ruth-Aaron pair, since the sum of their distinct prime factors is the same (929).

1131812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 931 (or 929 counting only the distinct ones).

The product of its digits is 48, while the sum is 17.

The square root of 1131812 is about 1063.8665329824. The cubic root of 1131812 is about 104.2136878557.

The spelling of 1131812 in words is "one million, one hundred thirty-one thousand, eight hundred twelve".

Divisors: 1 2 4 11 22 29 44 58 116 319 638 887 1276 1774 3548 9757 19514 25723 39028 51446 102892 282953 565906 1131812