1261564712 has 16 divisors (see below), whose sum is σ = 2374431840. Its totient is φ = 628382896.

The previous prime is 1261564709. The next prime is 1261564721. The reversal of 1261564712 is 2174651621.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297698 + ... + 301905.

It is an arithmetic number, because the mean of its divisors is an integer number (148401990).

Almost surely, 2^1261564712 is an apocalyptic number.

It is an amenable number.

1261564712 is a deficient number, since it is larger than the sum of its proper divisors (1112867128).

1261564712 is a wasteful number, since it uses less digits than its factorization.

1261564712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599872 (or 599868 counting only the distinct ones).

The product of its digits is 20160, while the sum is 35.

The square root of 1261564712 is about 35518.5122436174. The cubic root of 1261564712 is about 1080.5292079487.

The spelling of 1261564712 in words is "one billion, two hundred sixty-one million, five hundred sixty-four thousand, seven hundred twelve".