1442001221 has 8 divisors (see below), whose sum is σ = 1456270200. Its totient is φ = 1427751360.

The previous prime is 1442001167. The next prime is 1442001277. The reversal of 1442001221 is 1221002441.

It can be written as a sum of positive squares in 4 ways, for example, as 40322500 + 1401678721 = 6350^2 + 37439^2 .

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 1442001221 - 2¹⁴ = 1441984837 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1442001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1442001521) 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, 182411 + ... + 190151.

It is an arithmetic number, because the mean of its divisors is an integer number (182033775).

Almost surely, 2^1442001221 is an apocalyptic number.

It is an amenable number.

1442001221 is a deficient number, since it is larger than the sum of its proper divisors (14268979).

1442001221 is a wasteful number, since it uses less digits than its factorization.

1442001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9559.

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 1442001221 is about 37973.6911690186. The cubic root of 1442001221 is about 1129.7661094744.

Adding to 1442001221 its reverse (1221002441), we get a palindrome (2663003662).

The spelling of 1442001221 in words is "one billion, four hundred forty-two million, one thousand, two hundred twenty-one".