1272045968 has 20 divisors (see below), whose sum is σ = 2465271900. Its totient is φ = 635846784.

The previous prime is 1272045941. The next prime is 1272045979. The reversal of 1272045968 is 8695402721.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 478384384 + 793661584 = 21872^2 + 28172^2 .

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, 64046 + ... + 81522.

It is an arithmetic number, because the mean of its divisors is an integer number (123263595).

Almost surely, 2^1272045968 is an apocalyptic number.

It is an amenable number.

1272045968 is a deficient number, since it is larger than the sum of its proper divisors (1193225932).

1272045968 is a wasteful number, since it uses less digits than its factorization.

1272045968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22034 (or 22028 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 44.

The square root of 1272045968 is about 35665.7534337914. The cubic root of 1272045968 is about 1083.5133548146.

The spelling of 1272045968 in words is "one billion, two hundred seventy-two million, forty-five thousand, nine hundred sixty-eight".