1255389209 has 8 divisors (see below), whose sum is σ = 1290909312. Its totient is φ = 1220102560.

The previous prime is 1255389199. The next prime is 1255389253. The reversal of 1255389209 is 9029835521.

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 1255389209 - 2¹² = 1255385113 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1255389209.

It is not an unprimeable number, because it can be changed into a prime (1255389409) 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, 47429 + ... + 68994.

It is an arithmetic number, because the mean of its divisors is an integer number (161363664).

Almost surely, 2^1255389209 is an apocalyptic number.

It is an amenable number.

1255389209 is a deficient number, since it is larger than the sum of its proper divisors (35520103).

1255389209 is a wasteful number, since it uses less digits than its factorization.

1255389209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116727.

The product of its (nonzero) digits is 194400, while the sum is 44.

The square root of 1255389209 is about 35431.4720128871. The cubic root of 1255389209 is about 1078.7632187063.

The spelling of 1255389209 in words is "one billion, two hundred fifty-five million, three hundred eighty-nine thousand, two hundred nine".