1264045263 has 16 divisors (see below), whose sum is σ = 1836912000. Its totient is φ = 768500064.

The previous prime is 1264045229. The next prime is 1264045291. The reversal of 1264045263 is 3625404621.

It is not a de Polignac number, because 1264045263 - 2¹² = 1264041167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264040263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 192013 + ... + 198486.

It is an arithmetic number, because the mean of its divisors is an integer number (114807000).

Almost surely, 2^1264045263 is an apocalyptic number.

1264045263 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1264045263 is a deficient number, since it is larger than the sum of its proper divisors (572866737).

1264045263 is a wasteful number, since it uses less digits than its factorization.

1264045263 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390598.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 1264045263 is about 35553.4142242345. The cubic root of 1264045263 is about 1081.2369409674.

Adding to 1264045263 its reverse (3625404621), we get a palindrome (4889449884).

The spelling of 1264045263 in words is "one billion, two hundred sixty-four million, forty-five thousand, two hundred sixty-three".