1303521145 has 16 divisors (see below), whose sum is σ = 1636362000. Its totient is φ = 995534848.

The previous prime is 1303521119. The next prime is 1303521169. The reversal of 1303521145 is 5411253031.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 313537849 + 989983296 = 17707^2 + 31464^2 .

It is a cyclic number.

It is not a de Polignac number, because 1303521145 - 2¹¹ = 1303519097 is a prime.

It is a super-2 number, since 2×1303521145² = 3398334750924222050, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 37600 + ... + 63409.

It is an arithmetic number, because the mean of its divisors is an integer number (102272625).

Almost surely, 2^1303521145 is an apocalyptic number.

It is an amenable number.

1303521145 is a deficient number, since it is larger than the sum of its proper divisors (332840855).

1303521145 is a wasteful number, since it uses less digits than its factorization.

1303521145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101132.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 1303521145 is about 36104.3092303398. The cubic root of 1303521145 is about 1092.3773672061.

Adding to 1303521145 its reverse (5411253031), we get a palindrome (6714774176).

The spelling of 1303521145 in words is "one billion, three hundred three million, five hundred twenty-one thousand, one hundred forty-five".