1264885215 has 32 divisors (see below), whose sum is σ = 2210098176. Its totient is φ = 612639360.

The previous prime is 1264885201. The next prime is 1264885267. The reversal of 1264885215 is 5125884621.

It is not a de Polignac number, because 1264885215 - 2⁶ = 1264885151 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 180874 + ... + 187736.

It is an arithmetic number, because the mean of its divisors is an integer number (69065568).

Almost surely, 2^1264885215 is an apocalyptic number.

1264885215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1264885215 is a deficient number, since it is larger than the sum of its proper divisors (945212961).

1264885215 is a wasteful number, since it uses less digits than its factorization.

1264885215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7999.

The product of its digits is 153600, while the sum is 42.

The square root of 1264885215 is about 35565.2247989521. The cubic root of 1264885215 is about 1081.4763801894.

The spelling of 1264885215 in words is "one billion, two hundred sixty-four million, eight hundred eighty-five thousand, two hundred fifteen".