1289255 has 12 divisors (see below), whose sum is σ = 1701336. Its totient is φ = 937200.

The previous prime is 1289237. The next prime is 1289261. The reversal of 1289255 is 5529821.

1289255 = 49² + 50² + ... + 158².

1289255 is nontrivially palindromic in base 3.

It is not a de Polignac number, because 1289255 - 2¹² = 1285159 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 461 + ... + 1670.

It is an arithmetic number, because the mean of its divisors is an integer number (141778).

2^1289255 is an apocalyptic number.

1289255 is a deficient number, since it is larger than the sum of its proper divisors (412081).

1289255 is a wasteful number, since it uses less digits than its factorization.

1289255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2158 (or 2147 counting only the distinct ones).

The product of its digits is 7200, while the sum is 32.

The square root of 1289255 is about 1135.4536538318. The cubic root of 1289255 is about 108.8377633024.

The spelling of 1289255 in words is "one million, two hundred eighty-nine thousand, two hundred fifty-five".