1321424291 has 8 divisors (see below), whose sum is σ = 1443032064. Its totient is φ = 1200062920.

The previous prime is 1321424281. The next prime is 1321424323. The reversal of 1321424291 is 1924241231.

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

It is a cyclic number.

It is not a de Polignac number, because 1321424291 - 2⁶ = 1321424227 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1321424201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50291 + ... + 71916.

It is an arithmetic number, because the mean of its divisors is an integer number (180379008).

Almost surely, 2^1321424291 is an apocalyptic number.

1321424291 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1321424291 is a deficient number, since it is larger than the sum of its proper divisors (121607773).

1321424291 is a wasteful number, since it uses less digits than its factorization.

1321424291 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123201.

The product of its digits is 3456, while the sum is 29.

The square root of 1321424291 is about 36351.4001243418. The cubic root of 1321424291 is about 1097.3557121314.

The spelling of 1321424291 in words is "one billion, three hundred twenty-one million, four hundred twenty-four thousand, two hundred ninety-one".