1321023241 has 4 divisors (see below), whose sum is σ = 1390550800. Its totient is φ = 1251495684.

The previous prime is 1321023229. The next prime is 1321023271. The reversal of 1321023241 is 1423201231.

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 1321023241 - 2¹³ = 1321015049 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19), and also a Moran number because the ratio is a prime number: 69527539 = 1321023241 / (1 + 3 + 2 + 1 + 0 + 2 + 3 + 2 + 4 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321023271) 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, 34763751 + ... + 34763788.

It is an arithmetic number, because the mean of its divisors is an integer number (347637700).

Almost surely, 2^1321023241 is an apocalyptic number.

It is an amenable number.

1321023241 is a deficient number, since it is larger than the sum of its proper divisors (69527559).

1321023241 is an equidigital number, since it uses as much as digits as its factorization.

1321023241 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69527558.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1321023241 is about 36345.8834120179. The cubic root of 1321023241 is about 1097.2446857080.

Adding to 1321023241 its reverse (1423201231), we get a palindrome (2744224472).

The spelling of 1321023241 in words is "one billion, three hundred twenty-one million, twenty-three thousand, two hundred forty-one".