1065640 has 16 divisors (see below), whose sum is σ = 2397780. Its totient is φ = 426240.

The previous prime is 1065629. The next prime is 1065643. The reversal of 1065640 is 465601.

It can be written as a sum of positive squares in 2 ways, for example, as 948676 + 116964 = 974^2 + 342^2 .

It is a super-2 number, since 2×1065640² = 2271177219200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1065643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13281 + ... + 13360.

2^1065640 is an apocalyptic number.

1065640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1065640 is an abundant number, since it is smaller than the sum of its proper divisors (1332140).

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

1065640 is a wasteful number, since it uses less digits than its factorization.

1065640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26652 (or 26648 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1065640 is about 1032.2984064698. The cubic root of 1065640 is about 102.1417994483.

The spelling of 1065640 in words is "one million, sixty-five thousand, six hundred forty".