1284631215 has 16 divisors (see below), whose sum is σ = 2349040128. Its totient is φ = 587259936.

The previous prime is 1284631181. The next prime is 1284631219. The reversal of 1284631215 is 5121364821.

It is not a de Polignac number, because 1284631215 - 2¹¹ = 1284629167 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1284631219) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6117187 + ... + 6117396.

It is an arithmetic number, because the mean of its divisors is an integer number (146815008).

Almost surely, 2^1284631215 is an apocalyptic number.

1284631215 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1284631215 is a deficient number, since it is larger than the sum of its proper divisors (1064408913).

1284631215 is a wasteful number, since it uses less digits than its factorization.

1284631215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12234598.

The product of its digits is 11520, while the sum is 33.

The square root of 1284631215 is about 35841.7523985644. The cubic root of 1284631215 is about 1087.0749550466.

The spelling of 1284631215 in words is "one billion, two hundred eighty-four million, six hundred thirty-one thousand, two hundred fifteen".