1255530000 has 100 divisors (see below), whose sum is σ = 4053115088. Its totient is φ = 334800000.

The previous prime is 1255529983. The next prime is 1255530007. The reversal of 1255530000 is 355521.

It is a tau number, because it is divible by the number of its divisors (100).

It is not an unprimeable number, because it can be changed into a prime (1255530007) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9075 + ... + 50925.

Almost surely, 2^1255530000 is an apocalyptic number.

1255530000 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 1255530000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2026557544).

1255530000 is an abundant number, since it is smaller than the sum of its proper divisors (2797585088).

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

1255530000 is an equidigital number, since it uses as much as digits as its factorization.

1255530000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41882 (or 41861 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 21.

The square root of 1255530000 is about 35433.4587642810. The cubic root of 1255530000 is about 1078.8035447061.

Adding to 1255530000 its reverse (355521), we get a palindrome (1255885521).

The spelling of 1255530000 in words is "one billion, two hundred fifty-five million, five hundred thirty thousand".