1442240321 has 8 divisors (see below), whose sum is σ = 1454459904. Its totient is φ = 1430034480.

The previous prime is 1442240291. The next prime is 1442240347. The reversal of 1442240321 is 1230422441.

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 1442240321 - 2³⁰ = 368498497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1442240381) 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, 411386 + ... + 414876.

It is an arithmetic number, because the mean of its divisors is an integer number (181807488).

Almost surely, 2^1442240321 is an apocalyptic number.

It is an amenable number.

1442240321 is a deficient number, since it is larger than the sum of its proper divisors (12219583).

1442240321 is a wasteful number, since it uses less digits than its factorization.

1442240321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6871.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 1442240321 is about 37976.8392707977. The cubic root of 1442240321 is about 1129.8285486606.

Adding to 1442240321 its reverse (1230422441), we get a palindrome (2672662762).

The spelling of 1442240321 in words is "one billion, four hundred forty-two million, two hundred forty thousand, three hundred twenty-one".