1276261026 has 32 divisors (see below), whose sum is σ = 2722144320. Its totient is φ = 397510656.

The previous prime is 1276261003. The next prime is 1276261033. The reversal of 1276261026 is 6201626721.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30831 + ... + 59186.

It is an arithmetic number, because the mean of its divisors is an integer number (85067010).

Almost surely, 2^1276261026 is an apocalyptic number.

1276261026 is an abundant number, since it is smaller than the sum of its proper divisors (1445883294).

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

1276261026 is a wasteful number, since it uses less digits than its factorization.

1276261026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90178.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 1276261026 is about 35724.7956747131. The cubic root of 1276261026 is about 1084.7088138165.

Adding to 1276261026 its reverse (6201626721), we get a palindrome (7477887747).

The spelling of 1276261026 in words is "one billion, two hundred seventy-six million, two hundred sixty-one thousand, twenty-six".