1303521023 has 8 divisors (see below), whose sum is σ = 1490296992. Its totient is φ = 1116884736.

The previous prime is 1303521013. The next prime is 1303521031. The reversal of 1303521023 is 3201253031.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1303521023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1303520986 and 1303521004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1303521013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14090 + ... + 52967.

It is an arithmetic number, because the mean of its divisors is an integer number (186287124).

Almost surely, 2^1303521023 is an apocalyptic number.

1303521023 is a deficient number, since it is larger than the sum of its proper divisors (186775969).

1303521023 is an equidigital number, since it uses as much as digits as its factorization.

1303521023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69841.

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

The square root of 1303521023 is about 36104.3075407908. The cubic root of 1303521023 is about 1092.3773331266.

Adding to 1303521023 its reverse (3201253031), we get a palindrome (4504774054).

The spelling of 1303521023 in words is "one billion, three hundred three million, five hundred twenty-one thousand, twenty-three".