1255012000 has 144 divisors (see below), whose sum is σ = 3390679656. Its totient is φ = 456192000.

The previous prime is 1255011983. The next prime is 1255012123. The reversal of 1255012000 is 2105521.

It can be written as a sum of positive squares in 4 ways, for example, as 429484176 + 825527824 = 20724^2 + 28732^2 .

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 482704 + ... + 485296.

Almost surely, 2^1255012000 is an apocalyptic number.

1255012000 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 1255012000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1695339828).

1255012000 is an abundant number, since it is smaller than the sum of its proper divisors (2135667656).

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

1255012000 is a wasteful number, since it uses less digits than its factorization.

1255012000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2640 (or 2611 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 1255012000 is about 35426.1485346629. The cubic root of 1255012000 is about 1078.6551619234.

Adding to 1255012000 its reverse (2105521), we get a palindrome (1257117521).

The spelling of 1255012000 in words is "one billion, two hundred fifty-five million, twelve thousand".