1276380252900 has 135 divisors (see below), whose sum is σ = 4137850161291. Its totient is φ = 340340952960.

The previous prime is 1276380252887. The next prime is 1276380253039. The reversal of 1276380252900 is 92520836721.

The square root of 1276380252900 is 1129770.

It is a perfect power (a square), and thus also a powerful number.

1276380252900 is a `hidden beast` number, since 1 + 2 + 7 + 638 + 0 + 2 + 5 + 2 + 9 + 0 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 395019792036 + 881360460864 = 628506^2 + 938808^2 .

It is a tau number, because it is divible by the number of its divisors (135).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 101673024 + ... + 101685576.

Almost surely, 2^{1276380252900} is an apocalyptic number.

1276380252900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1276380252900 is the 1129770-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1276380252900

1276380252900 is an abundant number, since it is smaller than the sum of its proper divisors (2861469908391).

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

1276380252900 is an frugal number, since it uses more digits than its factorization.

1276380252900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25132 (or 12563 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The spelling of 1276380252900 in words is "one trillion, two hundred seventy-six billion, three hundred eighty million, two hundred fifty-two thousand, nine hundred".