1045220 has 24 divisors (see below), whose sum is σ = 2395008. Its totient is φ = 380000.

The previous prime is 1045199. The next prime is 1045223. The reversal of 1045220 is 225401.

It is a nialpdrome in base 11.

It is a junction number, because it is equal to n+sod(n) for n = 1045195 and 1045204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1045223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2156 + ... + 2595.

It is an arithmetic number, because the mean of its divisors is an integer number (99792).

2^1045220 is an apocalyptic number.

1045220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1045220 is an abundant number, since it is smaller than the sum of its proper divisors (1349788).

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

1045220 is a wasteful number, since it uses less digits than its factorization.

1045220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4771 (or 4769 counting only the distinct ones).

The product of its (nonzero) digits is 80, while the sum is 14.

The square root of 1045220 is about 1022.3600148676. The cubic root of 1045220 is about 101.4851669298.

The spelling of 1045220 in words is "one million, forty-five thousand, two hundred twenty".