1255015001280 has 896 divisors, whose sum is σ = 4622691409920. Its totient is φ = 286371348480.

The previous prime is 1255015001243. The next prime is 1255015001323. The reversal of 1255015001280 is 821005105521.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1316909284 + ... + 1316910236.

Almost surely, 2^{1255015001280} is an apocalyptic number.

1255015001280 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 1255015001280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2311345704960).

1255015001280 is an abundant number, since it is smaller than the sum of its proper divisors (3367676408640).

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

1255015001280 is a wasteful number, since it uses less digits than its factorization.

1255015001280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177 (or 1167 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 30.

The spelling of 1255015001280 in words is "one trillion, two hundred fifty-five billion, fifteen million, one thousand, two hundred eighty".