1343501521 has 4 divisors (see below), whose sum is σ = 1344936292. Its totient is φ = 1342066752.

The previous prime is 1343501491. The next prime is 1343501539. The reversal of 1343501521 is 1251053431.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 790734400 + 552767121 = 28120^2 + 23511^2 .

It is a cyclic number.

It is not a de Polignac number, because 1343501521 - 2¹¹ = 1343499473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1343561521) 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, 715980 + ... + 717853.

It is an arithmetic number, because the mean of its divisors is an integer number (336234073).

Almost surely, 2^1343501521 is an apocalyptic number.

It is an amenable number.

1343501521 is a deficient number, since it is larger than the sum of its proper divisors (1434771).

1343501521 is an equidigital number, since it uses as much as digits as its factorization.

1343501521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434770.

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

The square root of 1343501521 is about 36653.8063644146. The cubic root of 1343501521 is about 1103.4332185857.

Adding to 1343501521 its reverse (1251053431), we get a palindrome (2594554952).

The spelling of 1343501521 in words is "one billion, three hundred forty-three million, five hundred one thousand, five hundred twenty-one".