1276863560 has 48 divisors (see below), whose sum is σ = 3342000060. Its totient is φ = 437781120.

The previous prime is 1276863559. The next prime is 1276863563. The reversal of 1276863560 is 653686721.

It can be written as a sum of positive squares in 2 ways, for example, as 1251602884 + 25260676 = 35378^2 + 5026^2 .

It is not an unprimeable number, because it can be changed into a prime (1276863563) 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, 323771 + ... + 327690.

Almost surely, 2^1276863560 is an apocalyptic number.

1276863560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1276863560 is an abundant number, since it is smaller than the sum of its proper divisors (2065136500).

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

1276863560 is a wasteful number, since it uses less digits than its factorization.

1276863560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651486 (or 651475 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 1276863560 is about 35733.2276739731. The cubic root of 1276863560 is about 1084.8794871352.

The spelling of 1276863560 in words is "one billion, two hundred seventy-six million, eight hundred sixty-three thousand, five hundred sixty".