1255860000 has 180 divisors, whose sum is σ = 4463400942. Its totient is φ = 334848000.

The previous prime is 1255859977. The next prime is 1255860019. The reversal of 1255860000 is 685521.

1255860000 is a `hidden beast` number, since 1 + 2 + 5 + 58 + 600 + 0 + 0 = 666.

It can be written as a sum of positive squares in 5 ways, for example, as 3549456 + 1252310544 = 1884^2 + 35388^2 .

It is a tau number, because it is divible by the number of its divisors (180).

It is an unprimeable number.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 176512 + ... + 183488.

Almost surely, 2^1255860000 is an apocalyptic number.

1255860000 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 1255860000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2231700471).

1255860000 is an abundant number, since it is smaller than the sum of its proper divisors (3207540942).

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

1255860000 is an equidigital number, since it uses as much as digits as its factorization.

1255860000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7013 (or 6987 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 1255860000 is about 35438.1150740273. The cubic root of 1255860000 is about 1078.8980529971.

The spelling of 1255860000 in words is "one billion, two hundred fifty-five million, eight hundred sixty thousand".