1264275465 has 32 divisors (see below), whose sum is σ = 2191660416. Its totient is φ = 619852800.

The previous prime is 1264275437. The next prime is 1264275469. The reversal of 1264275465 is 5645724621.

It is not a de Polignac number, because 1264275465 - 2¹⁰ = 1264274441 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1264275469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46686 + ... + 68615.

It is an arithmetic number, because the mean of its divisors is an integer number (68489388).

Almost surely, 2^1264275465 is an apocalyptic number.

1264275465 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1264275465 is a deficient number, since it is larger than the sum of its proper divisors (927384951).

1264275465 is a wasteful number, since it uses less digits than its factorization.

1264275465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115369.

The product of its digits is 403200, while the sum is 42.

The square root of 1264275465 is about 35556.6514874503. The cubic root of 1264275465 is about 1081.3025735850.

The spelling of 1264275465 in words is "one billion, two hundred sixty-four million, two hundred seventy-five thousand, four hundred sixty-five".