1284873261 has 8 divisors (see below), whose sum is σ = 1957902144. Its totient is φ = 734213280.

The previous prime is 1284873259. The next prime is 1284873287. The reversal of 1284873261 is 1623784821.

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

It is not a de Polignac number, because 1284873261 - 2¹ = 1284873259 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1284873221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30592200 + ... + 30592241.

It is an arithmetic number, because the mean of its divisors is an integer number (244737768).

Almost surely, 2^1284873261 is an apocalyptic number.

It is an amenable number.

1284873261 is a deficient number, since it is larger than the sum of its proper divisors (673028883).

1284873261 is an equidigital number, since it uses as much as digits as its factorization.

1284873261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61184451.

The product of its digits is 129024, while the sum is 42.

The square root of 1284873261 is about 35845.1288322416. The cubic root of 1284873261 is about 1087.1432251249.

The spelling of 1284873261 in words is "one billion, two hundred eighty-four million, eight hundred seventy-three thousand, two hundred sixty-one".