1055421800 has 24 divisors (see below), whose sum is σ = 2453856150. Its totient is φ = 422168640.

The previous prime is 1055421793. The next prime is 1055421803. The reversal of 1055421800 is 81245501.

It can be written as a sum of positive squares in 3 ways, for example, as 1030281604 + 25140196 = 32098^2 + 5014^2 .

It is a super-2 number, since 2×1055421800² = 2227830351830480000, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1055421800.

It is not an unprimeable number, because it can be changed into a prime (1055421803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2638355 + ... + 2638754.

Almost surely, 2^1055421800 is an apocalyptic number.

1055421800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1055421800 is an abundant number, since it is smaller than the sum of its proper divisors (1398434350).

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

1055421800 is a wasteful number, since it uses less digits than its factorization.

1055421800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5277125 (or 5277116 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 1055421800 is about 32487.2559629157. The cubic root of 1055421800 is about 1018.1427821595.

The spelling of 1055421800 in words is "one billion, fifty-five million, four hundred twenty-one thousand, eight hundred".