1265530003 has 8 divisors (see below), whose sum is σ = 1278606560. Its totient is φ = 1252480320.

The previous prime is 1265529983. The next prime is 1265530009. The reversal of 1265530003 is 3000355621.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1265530003 - 2²⁵ = 1231975571 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1265530003.

It is not an unprimeable number, because it can be changed into a prime (1265530009) 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 in 7 ways as a sum of consecutive naturals, for example, 95938 + ... + 108328.

It is an arithmetic number, because the mean of its divisors is an integer number (159825820).

Almost surely, 2^1265530003 is an apocalyptic number.

1265530003 is a deficient number, since it is larger than the sum of its proper divisors (13076557).

1265530003 is a wasteful number, since it uses less digits than its factorization.

1265530003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13437.

The product of its (nonzero) digits is 2700, while the sum is 25.

The square root of 1265530003 is about 35574.2885101023. The cubic root of 1265530003 is about 1081.6601134717.

Adding to 1265530003 its reverse (3000355621), we get a palindrome (4265885624).

The spelling of 1265530003 in words is "one billion, two hundred sixty-five million, five hundred thirty thousand, three".