1265145602 has 18 divisors (see below), whose sum is σ = 2208164553. Its totient is φ = 542054352.

The previous prime is 1265145599. The next prime is 1265145611. The reversal of 1265145602 is 2065415621.

It can be written as a sum of positive squares in 2 ways, for example, as 1221572401 + 43573201 = 34951^2 + 6601^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=25151.

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 8 ways as a sum of consecutive naturals, for example, 350318 + ... + 353910.

Almost surely, 2^1265145602 is an apocalyptic number.

1265145602 is a deficient number, since it is larger than the sum of its proper divisors (943018951).

1265145602 is an frugal number, since it uses more digits than its factorization.

1265145602 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7202 (or 3602 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 1265145602 is about 35568.8853072457. The cubic root of 1265145602 is about 1081.5505853599.

Multiplying 1265145602 by its sum of digits (32), we get a square (40484659264 = 201208²).

The spelling of 1265145602 in words is "one billion, two hundred sixty-five million, one hundred forty-five thousand, six hundred two".