1305280047 has 8 divisors (see below), whose sum is σ = 1743271600. Its totient is φ = 868737600.

The previous prime is 1305280033. The next prime is 1305280049. The reversal of 1305280047 is 7400825031.

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

It is a de Polignac number, because none of the positive numbers 2^k-1305280047 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1305279996 and 1305280023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1305280049) 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, 360172 + ... + 363777.

It is an arithmetic number, because the mean of its divisors is an integer number (217908950).

Almost surely, 2^1305280047 is an apocalyptic number.

1305280047 is a deficient number, since it is larger than the sum of its proper divisors (437991553).

1305280047 is an equidigital number, since it uses as much as digits as its factorization.

1305280047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724553.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 1305280047 is about 36128.6596347000. The cubic root of 1305280047 is about 1092.8684783236.

The spelling of 1305280047 in words is "one billion, three hundred five million, two hundred eighty thousand, forty-seven".