1240564 has 12 divisors (see below), whose sum is σ = 2338084. Its totient is φ = 572544.

The previous prime is 1240559. The next prime is 1240607. The reversal of 1240564 is 4650421.

It can be written as a sum of positive squares in 2 ways, for example, as 116964 + 1123600 = 342^2 + 1060^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11877 + ... + 11980.

2^1240564 is an apocalyptic number.

It is an amenable number.

1240564 is a deficient number, since it is larger than the sum of its proper divisors (1097520).

1240564 is a wasteful number, since it uses less digits than its factorization.

1240564 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23874 (or 23872 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1240564 is about 1113.8060872522. The cubic root of 1240564 is about 107.4499929662.

Adding to 1240564 its reverse (4650421), we get a palindrome (5890985).

The spelling of 1240564 in words is "one million, two hundred forty thousand, five hundred sixty-four".