1276224889 has 12 divisors (see below), whose sum is σ = 1348526640. Its totient is φ = 1207622520.

The previous prime is 1276224883. The next prime is 1276224913. The reversal of 1276224889 is 9884226721.

It is not a de Polignac number, because 1276224889 - 2²¹ = 1274127737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1276224883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 421222 + ... + 424240.

It is an arithmetic number, because the mean of its divisors is an integer number (112377220).

Almost surely, 2^1276224889 is an apocalyptic number.

1276224889 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1276224889 is a deficient number, since it is larger than the sum of its proper divisors (72301751).

1276224889 is a wasteful number, since it uses less digits than its factorization.

1276224889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4228 (or 4209 counting only the distinct ones).

The product of its digits is 774144, while the sum is 49.

The square root of 1276224889 is about 35724.2899019701. The cubic root of 1276224889 is about 1084.6985759702.

The spelling of 1276224889 in words is "one billion, two hundred seventy-six million, two hundred twenty-four thousand, eight hundred eighty-nine".