1276540538 has 32 divisors (see below), whose sum is σ = 2359082880. Its totient is φ = 504492480.

The previous prime is 1276540493. The next prime is 1276540543. The reversal of 1276540538 is 8350456721.

It is a junction number, because it is equal to n+sod(n) for n = 1276540495 and 1276540504.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211973 + ... + 217911.

It is an arithmetic number, because the mean of its divisors is an integer number (73721340).

Almost surely, 2^1276540538 is an apocalyptic number.

1276540538 is a deficient number, since it is larger than the sum of its proper divisors (1082542342).

1276540538 is a wasteful number, since it uses less digits than its factorization.

1276540538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7142.

The product of its (nonzero) digits is 201600, while the sum is 41.

The square root of 1276540538 is about 35728.7074773214. The cubic root of 1276540538 is about 1084.7879948494.

The spelling of 1276540538 in words is "one billion, two hundred seventy-six million, five hundred forty thousand, five hundred thirty-eight".