1263255 has 32 divisors (see below), whose sum is σ = 2363904. Its totient is φ = 564096.

The previous prime is 1263247. The next prime is 1263259. The reversal of 1263255 is 5523621.

1263255 is a nontrivial binomial coefficient, being equal to C(1590, 2).

It is not a de Polignac number, because 1263255 - 2³ = 1263247 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1263259) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 5452 + ... + 5678.

It is an arithmetic number, because the mean of its divisors is an integer number (73872).

2^1263255 is an apocalyptic number.

1263255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1263255 is the 1589-th triangular number and also the 795-th hexagonal number.

1263255 is a deficient number, since it is larger than the sum of its proper divisors (1100649).

1263255 is a wasteful number, since it uses less digits than its factorization.

1263255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 295.

The product of its digits is 1800, while the sum is 24.

The square root of 1263255 is about 1123.9461730884. The cubic root of 1263255 is about 108.1011569376.

Adding to 1263255 its reverse (5523621), we get a palindrome (6786876).

The spelling of 1263255 in words is "one million, two hundred sixty-three thousand, two hundred fifty-five".