1284220671 has 8 divisors (see below), whose sum is σ = 1752115200. Its totient is φ = 836236632.

The previous prime is 1284220657. The next prime is 1284220673. The reversal of 1284220671 is 1760224821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1284220671 - 2¹¹ = 1284218623 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1284220673) 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 7 ways as a sum of consecutive naturals, for example, 4977471 + ... + 4977728.

It is an arithmetic number, because the mean of its divisors is an integer number (219014400).

Almost surely, 2^1284220671 is an apocalyptic number.

1284220671 is a deficient number, since it is larger than the sum of its proper divisors (467894529).

1284220671 is an equidigital number, since it uses as much as digits as its factorization.

1284220671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9955245.

The product of its (nonzero) digits is 10752, while the sum is 33.

The square root of 1284220671 is about 35836.0247655903. The cubic root of 1284220671 is about 1086.9591397979.

The spelling of 1284220671 in words is "one billion, two hundred eighty-four million, two hundred twenty thousand, six hundred seventy-one".