1139265 has 40 divisors (see below), whose sum is σ = 2134440. Its totient is φ = 580608.

The previous prime is 1139263. The next prime is 1139269. The reversal of 1139265 is 5629311.

It can be written as a sum of positive squares in 4 ways, for example, as 104976 + 1034289 = 324^2 + 1017^2 .

It is not a de Polignac number, because 1139265 - 2¹ = 1139263 is a prime.

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

It is not an unprimeable number, because it can be changed into a prime (1139263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 11697 + ... + 11793.

It is an arithmetic number, because the mean of its divisors is an integer number (53361).

2^1139265 is an apocalyptic number.

1139265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1139265 is a deficient number, since it is larger than the sum of its proper divisors (995175).

1139265 is an equidigital number, since it uses as much as digits as its factorization.

1139265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143 (or 134 counting only the distinct ones).

The product of its digits is 1620, while the sum is 27.

The square root of 1139265 is about 1067.3635744206. The cubic root of 1139265 is about 104.4419371747.

1139265 divided by its sum of digits (27) gives a triangular number (42195 = T₂₉₀).

The spelling of 1139265 in words is "one million, one hundred thirty-nine thousand, two hundred sixty-five".