1272375065 has 16 divisors (see below), whose sum is σ = 1715793408. Its totient is φ = 898746816.

The previous prime is 1272375011. The next prime is 1272375077. The reversal of 1272375065 is 5605732721.

It is a cyclic number.

It is not a de Polignac number, because 1272375065 - 2²⁰ = 1271326489 is a prime.

It is a Duffinian number.

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, 424049 + ... + 427038.

It is an arithmetic number, because the mean of its divisors is an integer number (107237088).

Almost surely, 2^1272375065 is an apocalyptic number.

It is an amenable number.

1272375065 is a deficient number, since it is larger than the sum of its proper divisors (443418343).

1272375065 is a wasteful number, since it uses less digits than its factorization.

1272375065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851128.

The product of its (nonzero) digits is 88200, while the sum is 38.

The square root of 1272375065 is about 35670.3667629028. The cubic root of 1272375065 is about 1083.6067870377.

The spelling of 1272375065 in words is "one billion, two hundred seventy-two million, three hundred seventy-five thousand, sixty-five".