1276721052 has 12 divisors (see below), whose sum is σ = 2979015816. Its totient is φ = 425573680.

The previous prime is 1276721011. The next prime is 1276721057. The reversal of 1276721052 is 2501276721.

It is a tau number, because it is divible by the number of its divisors (12).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1276721057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53196699 + ... + 53196722.

It is an arithmetic number, because the mean of its divisors is an integer number (248251318).

Almost surely, 2^1276721052 is an apocalyptic number.

1276721052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1276721052 is an abundant number, since it is smaller than the sum of its proper divisors (1702294764).

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

1276721052 is a wasteful number, since it uses less digits than its factorization.

1276721052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106393428 (or 106393426 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 1276721052 is about 35731.2335639284. The cubic root of 1276721052 is about 1084.8391252770.

Adding to 1276721052 its reverse (2501276721), we get a palindrome (3777997773).

The spelling of 1276721052 in words is "one billion, two hundred seventy-six million, seven hundred twenty-one thousand, fifty-two".