1125220 has 24 divisors (see below), whose sum is σ = 2386944. Its totient is φ = 445536.

The previous prime is 1125217. The next prime is 1125221. The reversal of 1125220 is 225211.

It is a super-2 number, since 2×1125220² = 2532240096800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1125220.

It is not an unprimeable number, because it can be changed into a prime (1125221) 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, 2319 + ... + 2761.

It is an arithmetic number, because the mean of its divisors is an integer number (99456).

2^1125220 is an apocalyptic number.

1125220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1125220 is an abundant number, since it is smaller than the sum of its proper divisors (1261724).

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

1125220 is a wasteful number, since it uses less digits than its factorization.

1125220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 579 (or 577 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 1125220 is about 1060.7638757047. The cubic root of 1125220 is about 104.0109702432.

Subtracting from 1125220 its reverse (225211), we obtain a palindrome (900009).

The spelling of 1125220 in words is "one million, one hundred twenty-five thousand, two hundred twenty".