1025220 has 48 divisors (see below), whose sum is σ = 3282048. Its totient is φ = 234240.

The previous prime is 1025209. The next prime is 1025231. The reversal of 1025220 is 225201.

1025220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1025209) and next prime (1025231).

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 1025196 and 1025205.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 801 + ... + 1640.

It is an arithmetic number, because the mean of its divisors is an integer number (68376).

2^1025220 is an apocalyptic number.

1025220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1025220 is an abundant number, since it is smaller than the sum of its proper divisors (2256828).

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

1025220 is a wasteful number, since it uses less digits than its factorization.

1025220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2460 (or 2458 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 12.

The square root of 1025220 is about 1012.5314809921. The cubic root of 1025220 is about 100.8336968470.

The spelling of 1025220 in words is "one million, twenty-five thousand, two hundred twenty".