1045621800 has 72 divisors (see below), whose sum is σ = 3511552590. Its totient is φ = 278832000.

The previous prime is 1045621783. The next prime is 1045621817. The reversal of 1045621800 is 81265401.

1045621800 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1045621783) and next prime (1045621817).

It can be written as a sum of positive squares in 3 ways, for example, as 946300644 + 99321156 = 30762^2 + 9966^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 288651 + ... + 292250.

Almost surely, 2^1045621800 is an apocalyptic number.

1045621800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1045621800 is an abundant number, since it is smaller than the sum of its proper divisors (2465930790).

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

1045621800 is a wasteful number, since it uses less digits than its factorization.

1045621800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 580923 (or 580911 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 1045621800 is about 32336.0758287087. The cubic root of 1045621800 is about 1014.9816946071.

The spelling of 1045621800 in words is "one billion, forty-five million, six hundred twenty-one thousand, eight hundred".