1321148533 has 4 divisors (see below), whose sum is σ = 1321332480. Its totient is φ = 1320964588.

The previous prime is 1321148519. The next prime is 1321148567. The reversal of 1321148533 is 3358411231.

It is a happy number.

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 1321148533 - 2¹³ = 1321140341 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1321148495 and 1321148504.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321178533) 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, 80743 + ... + 95716.

It is an arithmetic number, because the mean of its divisors is an integer number (330333120).

Almost surely, 2^1321148533 is an apocalyptic number.

It is an amenable number.

1321148533 is a deficient number, since it is larger than the sum of its proper divisors (183947).

1321148533 is an equidigital number, since it uses as much as digits as its factorization.

1321148533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183946.

The product of its digits is 8640, while the sum is 31.

The square root of 1321148533 is about 36347.6069776265. The cubic root of 1321148533 is about 1097.2793738777.

Adding to 1321148533 its reverse (3358411231), we get a palindrome (4679559764).

The spelling of 1321148533 in words is "one billion, three hundred twenty-one million, one hundred forty-eight thousand, five hundred thirty-three".