1066220 has 24 divisors (see below), whose sum is σ = 2268000. Its totient is φ = 420992.

The previous prime is 1066217. The next prime is 1066231. The reversal of 1066220 is 226601.

1066220 = T₂₈₆ + T₂₈₇ + ... + T₃₀₉.

It is a super-2 number, since 2×1066220² = 2273650176800, which contains 22 as substring.

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, 1481 + ... + 2079.

It is an arithmetic number, because the mean of its divisors is an integer number (94500).

2^1066220 is an apocalyptic number.

1066220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1066220 is an abundant number, since it is smaller than the sum of its proper divisors (1201780).

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

1066220 is a wasteful number, since it uses less digits than its factorization.

1066220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 697 (or 695 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 1066220 is about 1032.5792947760. The cubic root of 1066220 is about 102.1603271246.

The spelling of 1066220 in words is "one million, sixty-six thousand, two hundred twenty".