1065780 has 72 divisors (see below), whose sum is σ = 3354624. Its totient is φ = 273600.

The previous prime is 1065773. The next prime is 1065787. The reversal of 1065780 is 875601.

1065780 is a `hidden beast` number, since 1 + 0 + 657 + 8 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (1065773) and next prime (1065787).

It is a super-2 number, since 2×1065780² = 2271774016800, which contains 22 as substring.

It is a zygodrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1065787) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5485 + ... + 5675.

It is an arithmetic number, because the mean of its divisors is an integer number (46592).

2^1065780 is an apocalyptic number.

1065780 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 1065780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1677312).

1065780 is an abundant number, since it is smaller than the sum of its proper divisors (2288844).

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

1065780 is a wasteful number, since it uses less digits than its factorization.

1065780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 1680, while the sum is 27.

The square root of 1065780 is about 1032.3662140927. The cubic root of 1065780 is about 102.1462722615.

It can be divided in two parts, 106 and 5780, that added together give a triangular number (5886 = T₁₀₈).

The spelling of 1065780 in words is "one million, sixty-five thousand, seven hundred eighty".