1275251265 has 12 divisors (see below), whose sum is σ = 2210435604. Its totient is φ = 680133984.

The previous prime is 1275251227. The next prime is 1275251279. The reversal of 1275251265 is 5621525721.

1275251265 is a `hidden beast` number, since 1 + 2 + 7 + 525 + 126 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 905227569 + 370023696 = 30087^2 + 19236^2 .

It is not a de Polignac number, because 1275251265 - 2⁸ = 1275251009 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 14169414 + ... + 14169503.

It is an arithmetic number, because the mean of its divisors is an integer number (184202967).

Almost surely, 2^1275251265 is an apocalyptic number.

1275251265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1275251265 is a deficient number, since it is larger than the sum of its proper divisors (935184339).

1275251265 is a wasteful number, since it uses less digits than its factorization.

1275251265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28338928 (or 28338925 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 1275251265 is about 35710.6603831405. The cubic root of 1275251265 is about 1084.4226692053.

Adding to 1275251265 its reverse (5621525721), we get a palindrome (6896776986).

The spelling of 1275251265 in words is "one billion, two hundred seventy-five million, two hundred fifty-one thousand, two hundred sixty-five".