1056640 has 64 divisors (see below), whose sum is σ = 2741760. Its totient is φ = 387072.

The previous prime is 1056623. The next prime is 1056641. The reversal of 1056640 is 466501.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×1056640² = 2232976179200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1056641) 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 7 ways as a sum of consecutive naturals, for example, 8257 + ... + 8383.

It is an arithmetic number, because the mean of its divisors is an integer number (42840).

2^1056640 is an apocalyptic number.

1056640 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 1056640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1370880).

1056640 is an abundant number, since it is smaller than the sum of its proper divisors (1685120).

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

1056640 is a wasteful number, since it uses less digits than its factorization.

1056640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159 (or 147 counting only the distinct ones).

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

The square root of 1056640 is about 1027.9299587034. The cubic root of 1056640 is about 101.8534355350.

The spelling of 1056640 in words is "one million, fifty-six thousand, six hundred forty".