1066815 has 24 divisors (see below), whose sum is σ = 1873248. Its totient is φ = 561600.

The previous prime is 1066811. The next prime is 1066817. The reversal of 1066815 is 5186601.

Added to its reverse (5186601) it gives a triangular number (6253416 = T₃₅₃₆).

1066815 is nontrivially palindromic in base 14.

It is not a de Polignac number, because 1066815 - 2² = 1066811 is a prime.

It is a super-2 number, since 2×1066815² = 2276188488450, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1066811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6717 + ... + 6873.

It is an arithmetic number, because the mean of its divisors is an integer number (78052).

2^1066815 is an apocalyptic number.

1066815 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1066815 is a deficient number, since it is larger than the sum of its proper divisors (806433).

1066815 is a wasteful number, since it uses less digits than its factorization.

1066815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319 (or 316 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 1066815 is about 1032.8673680585. The cubic root of 1066815 is about 102.1793269843.

Adding to 1066815 its reverse (5186601), we get a triangular number (6253416 = T₃₅₃₆).

It can be divided in two parts, 1066 and 815, that added together give a palindrome (1881).

The spelling of 1066815 in words is "one million, sixty-six thousand, eight hundred fifteen".