1289551255 has 8 divisors (see below), whose sum is σ = 1547988624. Its totient is φ = 1031289600.

The previous prime is 1289551199. The next prime is 1289551279. The reversal of 1289551255 is 5521559821.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1289551255 - 2¹⁷ = 1289420183 is a prime.

It is a super-3 number, since 3×1289551255³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27201 + ... + 57610.

It is an arithmetic number, because the mean of its divisors is an integer number (193498578).

Almost surely, 2^1289551255 is an apocalyptic number.

1289551255 is a deficient number, since it is larger than the sum of its proper divisors (258437369).

1289551255 is an equidigital number, since it uses as much as digits as its factorization.

1289551255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87857.

The product of its digits is 180000, while the sum is 43.

The square root of 1289551255 is about 35910.3224017830. The cubic root of 1289551255 is about 1088.4609919199.

The spelling of 1289551255 in words is "one billion, two hundred eighty-nine million, five hundred fifty-one thousand, two hundred fifty-five".