1253203321 has 4 divisors (see below), whose sum is σ = 1270854144. Its totient is φ = 1235552500.

The previous prime is 1253203319. The next prime is 1253203363. The reversal of 1253203321 is 1233023521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1253203321 - 2¹ = 1253203319 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1253203292 and 1253203301.

It is not an unprimeable number, because it can be changed into a prime (1253203421) 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 3 ways as a sum of consecutive naturals, for example, 8825305 + ... + 8825446.

It is an arithmetic number, because the mean of its divisors is an integer number (317713536).

Almost surely, 2^1253203321 is an apocalyptic number.

It is an amenable number.

1253203321 is a deficient number, since it is larger than the sum of its proper divisors (17650823).

1253203321 is an equidigital number, since it uses as much as digits as its factorization.

1253203321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17650822.

The product of its (nonzero) digits is 1080, while the sum is 22.

The square root of 1253203321 is about 35400.6118732431. The cubic root of 1253203321 is about 1078.1367395498.

Adding to 1253203321 its reverse (1233023521), we get a palindrome (2486226842).

The spelling of 1253203321 in words is "one billion, two hundred fifty-three million, two hundred three thousand, three hundred twenty-one".