1255255100 has 144 divisors (see below), whose sum is σ = 3101801472. Its totient is φ = 436800000.

The previous prime is 1255255093. The next prime is 1255255103. The reversal of 1255255100 is 15525521.

It is a self number, because there is not a number n which added to its sum of digits gives 1255255100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1255255103) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4466960 + ... + 4467240.

It is an arithmetic number, because the mean of its divisors is an integer number (21540288).

Almost surely, 2^1255255100 is an apocalyptic number.

1255255100 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 1255255100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1550900736).

1255255100 is an abundant number, since it is smaller than the sum of its proper divisors (1846546372).

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

1255255100 is a wasteful number, since it uses less digits than its factorization.

1255255100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468 (or 461 counting only the distinct ones).

The product of its (nonzero) digits is 2500, while the sum is 26.

The square root of 1255255100 is about 35429.5794499455. The cubic root of 1255255100 is about 1078.7248037916.

The spelling of 1255255100 in words is "one billion, two hundred fifty-five million, two hundred fifty-five thousand, one hundred".