1231265 has 16 divisors (see below), whose sum is σ = 1708032. Its totient is φ = 834624.

The previous prime is 1231261. The next prime is 1231267. The reversal of 1231265 is 5621321.

It is not a de Polignac number, because 1231265 - 2² = 1231261 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1231261) 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, 4307 + ... + 4583.

It is an arithmetic number, because the mean of its divisors is an integer number (106752).

2^1231265 is an apocalyptic number.

It is an amenable number.

1231265 is a deficient number, since it is larger than the sum of its proper divisors (476767).

1231265 is a wasteful number, since it uses less digits than its factorization.

1231265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416.

The product of its digits is 360, while the sum is 20.

The square root of 1231265 is about 1109.6238101267. The cubic root of 1231265 is about 107.1808453654.

Adding to 1231265 its reverse (5621321), we get a palindrome (6852586).

The spelling of 1231265 in words is "one million, two hundred thirty-one thousand, two hundred sixty-five".