1276315540 has 24 divisors (see below), whose sum is σ = 2796796800. Its totient is φ = 488329248.

The previous prime is 1276315507. The next prime is 1276315543. The reversal of 1276315540 is 455136721.

It is a junction number, because it is equal to n+sod(n) for n = 1276315496 and 1276315505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1276315543) 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, 1386840 + ... + 1387759.

It is an arithmetic number, because the mean of its divisors is an integer number (116533200).

Almost surely, 2^1276315540 is an apocalyptic number.

1276315540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1276315540 is an abundant number, since it is smaller than the sum of its proper divisors (1520481260).

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

1276315540 is a wasteful number, since it uses less digits than its factorization.

1276315540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2774631 (or 2774629 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 34.

The square root of 1276315540 is about 35725.5586380395. The cubic root of 1276315540 is about 1084.7242576202.

The spelling of 1276315540 in words is "one billion, two hundred seventy-six million, three hundred fifteen thousand, five hundred forty".