1284378315 has 32 divisors (see below), whose sum is σ = 2245190400. Its totient is φ = 621793920.

The previous prime is 1284378289. The next prime is 1284378323. The reversal of 1284378315 is 5138734821.

It is not a de Polignac number, because 1284378315 - 2⁸ = 1284378059 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 111496 + ... + 122474.

It is an arithmetic number, because the mean of its divisors is an integer number (70162200).

Almost surely, 2^1284378315 is an apocalyptic number.

1284378315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1284378315 is a deficient number, since it is larger than the sum of its proper divisors (960812085).

1284378315 is a wasteful number, since it uses less digits than its factorization.

1284378315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11707.

The product of its digits is 161280, while the sum is 42.

The square root of 1284378315 is about 35838.2242166098. The cubic root of 1284378315 is about 1087.0036143911.

The spelling of 1284378315 in words is "one billion, two hundred eighty-four million, three hundred seventy-eight thousand, three hundred fifteen".