1205133503 has 8 divisors (see below), whose sum is σ = 1378191360. Its totient is φ = 1032299640.

The previous prime is 1205133499. The next prime is 1205133547. The reversal of 1205133503 is 3053315021.

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 1205133503 - 2² = 1205133499 is a prime.

It is a super-4 number, since 4×1205133503⁴ (a number of 37 digits) contains 4444 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1205130503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44303 + ... + 66128.

It is an arithmetic number, because the mean of its divisors is an integer number (172273920).

Almost surely, 2^1205133503 is an apocalyptic number.

1205133503 is a deficient number, since it is larger than the sum of its proper divisors (173057857).

1205133503 is a wasteful number, since it uses less digits than its factorization.

1205133503 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111997.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 1205133503 is about 34715.0328100090. The cubic root of 1205133503 is about 1064.1717359813.

Adding to 1205133503 its reverse (3053315021), we get a palindrome (4258448524).

It can be divided in two parts, 12051 and 33503, that added together give a palindrome (45554).

The spelling of 1205133503 in words is "one billion, two hundred five million, one hundred thirty-three thousand, five hundred three".