1255200000 has 216 divisors, whose sum is σ = 4183544736. Its totient is φ = 334080000.

The previous prime is 1255199963. The next prime is 1255200017. The reversal of 1255200000 is 25521.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2399739 + ... + 2400261.

Almost surely, 2^1255200000 is an apocalyptic number.

1255200000 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 1255200000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2091772368).

1255200000 is an abundant number, since it is smaller than the sum of its proper divisors (2928344736).

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

1255200000 is an frugal number, since it uses more digits than its factorization.

1255200000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567 (or 533 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 1255200000 is about 35428.8018425687. The cubic root of 1255200000 is about 1078.7090198535.

Adding to 1255200000 its reverse (25521), we get a palindrome (1255225521).

The spelling of 1255200000 in words is "one billion, two hundred fifty-five million, two hundred thousand".