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1121540 = 22578011
BaseRepresentation
bin100010001110100000100
32002222110112
410101310010
5241342130
640012152
712350540
oct4216404
92088415
101121540
116a66a2
12461058
13303644
14212a20
15172495
hex111d04

1121540 has 24 divisors (see below), whose sum is σ = 2692032. Its totient is φ = 384480.

The previous prime is 1121539. The next prime is 1121543. The reversal of 1121540 is 451211.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is not an unprimeable number, because it can be changed into a prime (1121543) 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, 3866 + ... + 4145.

It is an arithmetic number, because the mean of its divisors is an integer number (112168).

21121540 is an apocalyptic number.

1121540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1121540 is an abundant number, since it is smaller than the sum of its proper divisors (1570492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1121540 is a wasteful number, since it uses less digits than its factorization.

1121540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8027 (or 8025 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 1121540 is about 1059.0278561020. The cubic root of 1121540 is about 103.8974581006.

Adding to 1121540 its reverse (451211), we get a palindrome (1572751).

It can be divided in two parts, 1121 and 540, that added together give a palindrome (1661).

The spelling of 1121540 in words is "one million, one hundred twenty-one thousand, five hundred forty".

Divisors: 1 2 4 5 7 10 14 20 28 35 70 140 8011 16022 32044 40055 56077 80110 112154 160220 224308 280385 560770 1121540