1304780257 has 4 divisors (see below), whose sum is σ = 1423396656. Its totient is φ = 1186163860.

The previous prime is 1304780227. The next prime is 1304780291. The reversal of 1304780257 is 7520874031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1304780257 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1304780227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59308183 + ... + 59308204.

It is an arithmetic number, because the mean of its divisors is an integer number (355849164).

Almost surely, 2^1304780257 is an apocalyptic number.

It is an amenable number.

1304780257 is a deficient number, since it is larger than the sum of its proper divisors (118616399).

1304780257 is a wasteful number, since it uses less digits than its factorization.

1304780257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118616398.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 1304780257 is about 36121.7421645191. The cubic root of 1304780257 is about 1092.7289745528.

The spelling of 1304780257 in words is "one billion, three hundred four million, seven hundred eighty thousand, two hundred fifty-seven".