1276203280 has 40 divisors (see below), whose sum is σ = 3236917824. Its totient is φ = 464073600.

The previous prime is 1276203259. The next prime is 1276203281. The reversal of 1276203280 is 823026721.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1276203281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 724236 + ... + 725995.

Almost surely, 2^1276203280 is an apocalyptic number.

1276203280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1276203280 is an abundant number, since it is smaller than the sum of its proper divisors (1960714544).

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

1276203280 is a wasteful number, since it uses less digits than its factorization.

1276203280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450255 (or 1450249 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 1276203280 is about 35723.9874594088. The cubic root of 1276203280 is about 1084.6924539082.

The spelling of 1276203280 in words is "one billion, two hundred seventy-six million, two hundred three thousand, two hundred eighty".