1265240364 has 12 divisors (see below), whose sum is σ = 2952227544. Its totient is φ = 421746784.

The previous prime is 1265240341. The next prime is 1265240369. The reversal of 1265240364 is 4630425621.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (1265240369) by changing a digit.

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, 52718337 + ... + 52718360.

It is an arithmetic number, because the mean of its divisors is an integer number (246018962).

Almost surely, 2^1265240364 is an apocalyptic number.

It is an amenable number.

1265240364 is an abundant number, since it is smaller than the sum of its proper divisors (1686987180).

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

1265240364 is a wasteful number, since it uses less digits than its factorization.

1265240364 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105436704 (or 105436702 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 1265240364 is about 35570.2173735275. The cubic root of 1265240364 is about 1081.5775881380.

Adding to 1265240364 its reverse (4630425621), we get a palindrome (5895665985).

The spelling of 1265240364 in words is "one billion, two hundred sixty-five million, two hundred forty thousand, three hundred sixty-four".