1055440 has 40 divisors (see below), whose sum is σ = 2499840. Its totient is φ = 414336.

The previous prime is 1055437. The next prime is 1055471. The reversal of 1055440 is 445501.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×1055440² = 2227907187200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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, 6237 + ... + 6403.

It is an arithmetic number, because the mean of its divisors is an integer number (62496).

2^1055440 is an apocalyptic number.

1055440 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 1055440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1249920).

1055440 is an abundant number, since it is smaller than the sum of its proper divisors (1444400).

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

1055440 is a wasteful number, since it uses less digits than its factorization.

1055440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259 (or 253 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 19.

The square root of 1055440 is about 1027.3460955296. The cubic root of 1055440 is about 101.8148634509.

The spelling of 1055440 in words is "one million, fifty-five thousand, four hundred forty".