1265546564 has 12 divisors (see below), whose sum is σ = 2236634988. Its totient is φ = 626508000.

The previous prime is 1265546563. The next prime is 1265546617. The reversal of 1265546564 is 4656455621.

It can be written as a sum of positive squares in 2 ways, for example, as 936849664 + 328696900 = 30608^2 + 18130^2 .

It is not an unprimeable number, because it can be changed into a prime (1265546563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1565867 + ... + 1566674.

It is an arithmetic number, because the mean of its divisors is an integer number (186386249).

Almost surely, 2^1265546564 is an apocalyptic number.

It is an amenable number.

1265546564 is a deficient number, since it is larger than the sum of its proper divisors (971088424).

1265546564 is a wasteful number, since it uses less digits than its factorization.

1265546564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3132646 (or 3132644 counting only the distinct ones).

The product of its digits is 864000, while the sum is 44.

The square root of 1265546564 is about 35574.5212757670. The cubic root of 1265546564 is about 1081.6648317307.

The spelling of 1265546564 in words is "one billion, two hundred sixty-five million, five hundred forty-six thousand, five hundred sixty-four".