1280425653 has 24 divisors (see below), whose sum is σ = 2034160128. Its totient is φ = 771185952.

The previous prime is 1280425649. The next prime is 1280425673. The reversal of 1280425653 is 3565240821.

1280425653 is a `hidden beast` number, since 12 + 80 + 4 + 2 + 565 + 3 = 666.

It is not a de Polignac number, because 1280425653 - 2² = 1280425649 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1280425673) 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 23 ways as a sum of consecutive naturals, for example, 110925 + ... + 121922.

It is an arithmetic number, because the mean of its divisors is an integer number (84756672).

Almost surely, 2^1280425653 is an apocalyptic number.

1280425653 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1280425653 is a deficient number, since it is larger than the sum of its proper divisors (753734475).

1280425653 is a wasteful number, since it uses less digits than its factorization.

1280425653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232913 (or 232910 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The square root of 1280425653 is about 35783.0358270508. The cubic root of 1280425653 is about 1085.8873874664.

The spelling of 1280425653 in words is "one billion, two hundred eighty million, four hundred twenty-five thousand, six hundred fifty-three".