1280438507 has 8 divisors (see below), whose sum is σ = 1286870976. Its totient is φ = 1274017792.

The previous prime is 1280438483. The next prime is 1280438527. The reversal of 1280438507 is 7058340821.

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 1280438507 - 2¹² = 1280434411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1280438527) 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, 281213 + ... + 285729.

It is an arithmetic number, because the mean of its divisors is an integer number (160858872).

Almost surely, 2^1280438507 is an apocalyptic number.

1280438507 is a deficient number, since it is larger than the sum of its proper divisors (6432469).

1280438507 is a wasteful number, since it uses less digits than its factorization.

1280438507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5877.

The product of its (nonzero) digits is 53760, while the sum is 38.

The square root of 1280438507 is about 35783.2154368497. The cubic root of 1280438507 is about 1085.8910211408.

The spelling of 1280438507 in words is "one billion, two hundred eighty million, four hundred thirty-eight thousand, five hundred seven".