1261264 has 20 divisors (see below), whose sum is σ = 2588004. Its totient is φ = 593408.

The previous prime is 1261261. The next prime is 1261279. The reversal of 1261264 is 4621621.

It can be written as a sum of positive squares in 2 ways, for example, as 652864 + 608400 = 808^2 + 780^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1261261) 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 3 ways as a sum of consecutive naturals, for example, 2047 + ... + 2590.

2^1261264 is an apocalyptic number.

It is an amenable number.

1261264 is an abundant number, since it is smaller than the sum of its proper divisors (1326740).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1261264 is a wasteful number, since it uses less digits than its factorization.

1261264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4662 (or 4656 counting only the distinct ones).

The product of its digits is 576, while the sum is 22.

The square root of 1261264 is about 1123.0601052482. The cubic root of 1261264 is about 108.0443347927.

Adding to 1261264 its reverse (4621621), we get a palindrome (5882885).

The spelling of 1261264 in words is "one million, two hundred sixty-one thousand, two hundred sixty-four".