1149255 has 16 divisors (see below), whose sum is σ = 2043360. Its totient is φ = 612864.

The previous prime is 1149233. The next prime is 1149259. The reversal of 1149255 is 5529411.

It is not a de Polignac number, because 1149255 - 2⁶ = 1149191 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1149259) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4122 + ... + 4391.

It is an arithmetic number, because the mean of its divisors is an integer number (127710).

2^1149255 is an apocalyptic number.

1149255 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1149255 is a deficient number, since it is larger than the sum of its proper divisors (894105).

1149255 is an equidigital number, since it uses as much as digits as its factorization.

1149255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8527 (or 8521 counting only the distinct ones).

The product of its digits is 1800, while the sum is 27.

The square root of 1149255 is about 1072.0331151602. The cubic root of 1149255 is about 104.7463264091.

It can be divided in two parts, 1149 and 255, that multiplied together give a triangular number (292995 = T₇₆₅).

The spelling of 1149255 in words is "one million, one hundred forty-nine thousand, two hundred fifty-five".