1265502533 has 2 divisors, whose sum is σ = 1265502534. Its totient is φ = 1265502532.

The previous prime is 1265502503. The next prime is 1265502541. The reversal of 1265502533 is 3352055621.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1162946404 + 102556129 = 34102^2 + 10127^2 .

It is a cyclic number.

It is not a de Polignac number, because 1265502533 - 2¹⁴ = 1265486149 is a prime.

It is a super-2 number, since 2×1265502533² = 3202993322058832178, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1265502533.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1265502503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632751266 + 632751267.

It is an arithmetic number, because the mean of its divisors is an integer number (632751267).

Almost surely, 2^1265502533 is an apocalyptic number.

It is an amenable number.

1265502533 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265502533 is an equidigital number, since it uses as much as digits as its factorization.

1265502533 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 32.

The square root of 1265502533 is about 35573.9024145510. The cubic root of 1265502533 is about 1081.6522871280.

The spelling of 1265502533 in words is "one billion, two hundred sixty-five million, five hundred two thousand, five hundred thirty-three".