1255240140 has 192 divisors, whose sum is σ = 4428684288. Its totient is φ = 258048000.

The previous prime is 1255240123. The next prime is 1255240153. The reversal of 1255240140 is 410425521.

It is a super-3 number, since 3×1255240140³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1255240140.

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, 446740 + ... + 449540.

It is an arithmetic number, because the mean of its divisors is an integer number (23066064).

Almost surely, 2^1255240140 is an apocalyptic number.

1255240140 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 1255240140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2214342144).

1255240140 is an abundant number, since it is smaller than the sum of its proper divisors (3173444148).

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

1255240140 is a wasteful number, since it uses less digits than its factorization.

1255240140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2928 (or 2926 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 24.

The square root of 1255240140 is about 35429.3683262911. The cubic root of 1255240140 is about 1078.7205183978.

Adding to 1255240140 its reverse (410425521), we get a palindrome (1665665661).

The spelling of 1255240140 in words is "one billion, two hundred fifty-five million, two hundred forty thousand, one hundred forty".