1442245721 has 8 divisors (see below), whose sum is σ = 1648532544. Its totient is φ = 1236021840.

The previous prime is 1442245709. The next prime is 1442245723. The reversal of 1442245721 is 1275422441.

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 1442245721 - 2¹⁸ = 1441983577 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1442245723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 53966 + ... + 76136.

It is an arithmetic number, because the mean of its divisors is an integer number (206066568).

Almost surely, 2^1442245721 is an apocalyptic number.

It is an amenable number.

1442245721 is a deficient number, since it is larger than the sum of its proper divisors (206286823).

1442245721 is an equidigital number, since it uses as much as digits as its factorization.

1442245721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31471.

The product of its digits is 17920, while the sum is 32.

The square root of 1442245721 is about 37976.9103666952. The cubic root of 1442245721 is about 1129.8299587507.

The spelling of 1442245721 in words is "one billion, four hundred forty-two million, two hundred forty-five thousand, seven hundred twenty-one".