1265531324 has 12 divisors (see below), whose sum is σ = 2214953664. Its totient is φ = 632687424.

The previous prime is 1265531291. The next prime is 1265531329. The reversal of 1265531324 is 4231355621.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265531329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31844 + ... + 59540.

It is an arithmetic number, because the mean of its divisors is an integer number (184579472).

Almost surely, 2^1265531324 is an apocalyptic number.

It is an amenable number.

1265531324 is a deficient number, since it is larger than the sum of its proper divisors (949422340).

1265531324 is a wasteful number, since it uses less digits than its factorization.

1265531324 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39124 (or 39122 counting only the distinct ones).

The product of its digits is 21600, while the sum is 32.

The square root of 1265531324 is about 35574.3070768778. The cubic root of 1265531324 is about 1081.6604898285.

Adding to 1265531324 its reverse (4231355621), we get a palindrome (5496886945).

The spelling of 1265531324 in words is "one billion, two hundred sixty-five million, five hundred thirty-one thousand, three hundred twenty-four".