1255163040 has 384 divisors, whose sum is σ = 4731229440. Its totient is φ = 313528320.

The previous prime is 1255163017. The next prime is 1255163093. The reversal of 1255163040 is 403615521.

1255163040 is a `hidden beast` number, since 1 + 25 + 5 + 1 + 630 + 4 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1255162995 and 1255163013.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5948535 + ... + 5948745.

It is an arithmetic number, because the mean of its divisors is an integer number (12320910).

Almost surely, 2^1255163040 is an apocalyptic number.

1255163040 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 1255163040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2365614720).

1255163040 is an abundant number, since it is smaller than the sum of its proper divisors (3476066400).

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

1255163040 is an equidigital number, since it uses as much as digits as its factorization.

1255163040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 238 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 1255163040 is about 35428.2802292180. The cubic root of 1255163040 is about 1078.6984320383.

Adding to 1255163040 its reverse (403615521), we get a palindrome (1658778561).

The spelling of 1255163040 in words is "one billion, two hundred fifty-five million, one hundred sixty-three thousand, forty".