1291264050244 has 81 divisors (see below), whose sum is σ = 2748681539037. Its totient is φ = 529188061248.

The previous prime is 1291264050203. The next prime is 1291264050281. The reversal of 1291264050244 is 4420504621921.

The square root of 1291264050244 is 1136338.

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

It can be written as a sum of positive squares in only one way, i.e., 120713163844 + 1170550886400 = 347438^2 + 1081920^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1291264050197 and 1291264050206.

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 26 ways as a sum of consecutive naturals, for example, 365899072 + ... + 365902600.

Almost surely, 2^{1291264050244} is an apocalyptic number.

1291264050244 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1291264050244 is the 1136338-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1291264050244

1291264050244 is an abundant number, since it is smaller than the sum of its proper divisors (1457417488793).

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

1291264050244 is an frugal number, since it uses more digits than its factorization.

1291264050244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7122 (or 3561 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 40.

The spelling of 1291264050244 in words is "one trillion, two hundred ninety-one billion, two hundred sixty-four million, fifty thousand, two hundred forty-four".