1255000100 has 18 divisors (see below), whose sum is σ = 2723350434. Its totient is φ = 502000000.

The previous prime is 1255000093. The next prime is 1255000121. The reversal of 1255000100 is 10005521.

It can be written as a sum of positive squares in 3 ways, for example, as 4104676 + 1250895424 = 2026^2 + 35368^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6274901 + ... + 6275100.

Almost surely, 2^1255000100 is an apocalyptic number.

1255000100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1255000100 is an abundant number, since it is smaller than the sum of its proper divisors (1468350334).

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

1255000100 is a wasteful number, since it uses less digits than its factorization.

1255000100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12550015 (or 12550008 counting only the distinct ones).

The product of its (nonzero) digits is 50, while the sum is 14.

The square root of 1255000100 is about 35425.9805792303. The cubic root of 1255000100 is about 1078.6517526500.

Adding to 1255000100 its reverse (10005521), we get a palindrome (1265005621).

The spelling of 1255000100 in words is "one billion, two hundred fifty-five million, one hundred", and thus it is an aban number.