1265897203 has 2 divisors, whose sum is σ = 1265897204. Its totient is φ = 1265897202.

The previous prime is 1265897131. The next prime is 1265897233. The reversal of 1265897203 is 3027985621.

It is a strong prime.

It is an emirp because it is prime and its reverse (3027985621) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1265897203 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1265897203.

It is not a weakly prime, because it can be changed into another prime (1265897233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632948601 + 632948602.

It is an arithmetic number, because the mean of its divisors is an integer number (632948602).

Almost surely, 2^1265897203 is an apocalyptic number.

1265897203 is a deficient number, since it is larger than the sum of its proper divisors (1).

1265897203 is an equidigital number, since it uses as much as digits as its factorization.

1265897203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 1265897203 is about 35579.4491666186. The cubic root of 1265897203 is about 1081.7647197588.

The spelling of 1265897203 in words is "one billion, two hundred sixty-five million, eight hundred ninety-seven thousand, two hundred three".