1280711716 has 48 divisors (see below), whose sum is σ = 2324037744. Its totient is φ = 617250816.

The previous prime is 1280711683. The next prime is 1280711749. The reversal of 1280711716 is 6171170821.

It is an interprime number because it is at equal distance from previous prime (1280711683) and next prime (1280711749).

It can be written as a sum of positive squares in 8 ways, for example, as 322561600 + 958150116 = 17960^2 + 30954^2 .

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, 4623370 + ... + 4623646.

It is an arithmetic number, because the mean of its divisors is an integer number (48417453).

Almost surely, 2^1280711716 is an apocalyptic number.

It is an amenable number.

1280711716 is a deficient number, since it is larger than the sum of its proper divisors (1043326028).

1280711716 is a wasteful number, since it uses less digits than its factorization.

1280711716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640 (or 638 counting only the distinct ones).

The product of its (nonzero) digits is 4704, while the sum is 34.

The square root of 1280711716 is about 35787.0327912220. The cubic root of 1280711716 is about 1085.9682483563.

The spelling of 1280711716 in words is "one billion, two hundred eighty million, seven hundred eleven thousand, seven hundred sixteen".