1066280 has 64 divisors (see below), whose sum is σ = 2678400. Its totient is φ = 380160.

The previous prime is 1066279. The next prime is 1066283. The reversal of 1066280 is 826601.

It is a super-2 number, since 2×1066280² = 2273906076800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066283) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17450 + ... + 17510.

It is an arithmetic number, because the mean of its divisors is an integer number (41850).

2^1066280 is an apocalyptic number.

1066280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1066280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1339200).

1066280 is an abundant number, since it is smaller than the sum of its proper divisors (1612120).

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

1066280 is a wasteful number, since it uses less digits than its factorization.

1066280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114 (or 110 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 1066280 is about 1032.6083478260. The cubic root of 1066280 is about 102.1622433973.

1066280 divided by its sum of digits (23) gives a triangular number (46360 = T₃₀₄).

The spelling of 1066280 in words is "one million, sixty-six thousand, two hundred eighty".