1284352261 has 8 divisors (see below), whose sum is σ = 1406796120. Its totient is φ = 1167118848.

The previous prime is 1284352247. The next prime is 1284352283. The reversal of 1284352261 is 1622534821.

It can be written as a sum of positive squares in 4 ways, for example, as 503149761 + 781202500 = 22431^2 + 27950^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 1284352261 - 2⁵ = 1284352229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1284352211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1302096 + ... + 1303081.

It is an arithmetic number, because the mean of its divisors is an integer number (175849515).

Almost surely, 2^1284352261 is an apocalyptic number.

It is an amenable number.

1284352261 is a deficient number, since it is larger than the sum of its proper divisors (122443859).

1284352261 is a wasteful number, since it uses less digits than its factorization.

1284352261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2605223.

The product of its digits is 23040, while the sum is 34.

The square root of 1284352261 is about 35837.8607201937. The cubic root of 1284352261 is about 1086.9962642764.

The spelling of 1284352261 in words is "one billion, two hundred eighty-four million, three hundred fifty-two thousand, two hundred sixty-one".