1405220 has 24 divisors (see below), whose sum is σ = 3125304. Its totient is φ = 528896.

The previous prime is 1405211. The next prime is 1405241. The reversal of 1405220 is 225041.

It can be written as a sum of positive squares in 4 ways, for example, as 440896 + 964324 = 664^2 + 982^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1405195 and 1405204.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1727 + ... + 2406.

It is an arithmetic number, because the mean of its divisors is an integer number (130221).

2^1405220 is an apocalyptic number.

1405220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1405220 is an abundant number, since it is smaller than the sum of its proper divisors (1720084).

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

1405220 is a wasteful number, since it uses less digits than its factorization.

1405220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4159 (or 4157 counting only the distinct ones).

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

The square root of 1405220 is about 1185.4197568794. The cubic root of 1405220 is about 112.0077588162.

The spelling of 1405220 in words is "one million, four hundred five thousand, two hundred twenty".