1253312003 has 4 divisors (see below), whose sum is σ = 1261295040. Its totient is φ = 1245328968.

The previous prime is 1253311999. The next prime is 1253312017. The reversal of 1253312003 is 3002133521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1253312003 - 2² = 1253311999 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1253312033) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3991283 + ... + 3991596.

It is an arithmetic number, because the mean of its divisors is an integer number (315323760).

Almost surely, 2^1253312003 is an apocalyptic number.

1253312003 is a deficient number, since it is larger than the sum of its proper divisors (7983037).

1253312003 is an equidigital number, since it uses as much as digits as its factorization.

1253312003 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7983036.

The product of its (nonzero) digits is 540, while the sum is 20.

The square root of 1253312003 is about 35402.1468699287. The cubic root of 1253312003 is about 1078.1679051950.

Adding to 1253312003 its reverse (3002133521), we get a palindrome (4255445524).

The spelling of 1253312003 in words is "one billion, two hundred fifty-three million, three hundred twelve thousand, three".