1055540 has 24 divisors (see below), whose sum is σ = 2245320. Its totient is φ = 416768.

The previous prime is 1055531. The next prime is 1055543. The reversal of 1055540 is 455501.

It can be written as a sum of positive squares in 4 ways, for example, as 47524 + 1008016 = 218^2 + 1004^2 .

It is a super-2 number, since 2×1055540² = 2228329383200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1055543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1484 + ... + 2076.

It is an arithmetic number, because the mean of its divisors is an integer number (93555).

2^1055540 is an apocalyptic number.

1055540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1055540 is an abundant number, since it is smaller than the sum of its proper divisors (1189780).

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

1055540 is a wasteful number, since it uses less digits than its factorization.

1055540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 691 (or 689 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 20.

The square root of 1055540 is about 1027.3947634673. The cubic root of 1055540 is about 101.8180789076.

The spelling of 1055540 in words is "one million, fifty-five thousand, five hundred forty".