1125021300 has 72 divisors (see below), whose sum is σ = 3505463136. Its totient is φ = 276927360.

The previous prime is 1125021299. The next prime is 1125021343. The reversal of 1125021300 is 31205211.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 1125021300.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 140334 + ... + 148133.

It is an arithmetic number, because the mean of its divisors is an integer number (48686988).

Almost surely, 2^1125021300 is an apocalyptic number.

1125021300 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1125021300 is an abundant number, since it is smaller than the sum of its proper divisors (2380441836).

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

1125021300 is a wasteful number, since it uses less digits than its factorization.

1125021300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 288497 (or 288490 counting only the distinct ones).

The product of its (nonzero) digits is 60, while the sum is 15.

The square root of 1125021300 is about 33541.3371826467. The cubic root of 1125021300 is about 1040.0484753046.

Adding to 1125021300 its reverse (31205211), we get a palindrome (1156226511).

The spelling of 1125021300 in words is "one billion, one hundred twenty-five million, twenty-one thousand, three hundred".