1081224 has 24 divisors (see below), whose sum is σ = 2928510. Its totient is φ = 360384.

The previous prime is 1081219. The next prime is 1081229. The reversal of 1081224 is 4221801.

It is an interprime number because it is at equal distance from previous prime (1081219) and next prime (1081229).

It can be written as a sum of positive squares in only one way, i.e., 980100 + 101124 = 990^2 + 318^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1081197 and 1081206.

It is not an unprimeable number, because it can be changed into a prime (1081229) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7437 + ... + 7580.

2^1081224 is an apocalyptic number.

It is an amenable number.

1081224 is an abundant number, since it is smaller than the sum of its proper divisors (1847286).

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

1081224 is a wasteful number, since it uses less digits than its factorization.

1081224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15029 (or 15022 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

The square root of 1081224 is about 1039.8192150562. The cubic root of 1081224 is about 102.6373016221.

The spelling of 1081224 in words is "one million, eighty-one thousand, two hundred twenty-four".