1284431255 has 12 divisors (see below), whose sum is σ = 1622880840. Its totient is φ = 973198944.

The previous prime is 1284431249. The next prime is 1284431263. The reversal of 1284431255 is 5521344821.

It is not a de Polignac number, because 1284431255 - 2⁶ = 1284431191 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 347477 + ... + 351153.

It is an arithmetic number, because the mean of its divisors is an integer number (135240070).

Almost surely, 2^1284431255 is an apocalyptic number.

1284431255 is a deficient number, since it is larger than the sum of its proper divisors (338449585).

1284431255 is an frugal number, since it uses more digits than its factorization.

1284431255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7378 (or 3701 counting only the distinct ones).

The product of its digits is 38400, while the sum is 35.

The square root of 1284431255 is about 35838.9628058626. The cubic root of 1284431255 is about 1087.0185490304.

The spelling of 1284431255 in words is "one billion, two hundred eighty-four million, four hundred thirty-one thousand, two hundred fifty-five".