1442446981 has 2 divisors, whose sum is σ = 1442446982. Its totient is φ = 1442446980.

The previous prime is 1442446879. The next prime is 1442447009. The reversal of 1442446981 is 1896442441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1127952225 + 314494756 = 33585^2 + 17734^2 .

It is a cyclic number.

It is not a de Polignac number, because 1442446981 - 2¹⁵ = 1442414213 is a prime.

It is a super-2 number, since 2×1442446981² = 4161306585992028722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1448446981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 721223490 + 721223491.

It is an arithmetic number, because the mean of its divisors is an integer number (721223491).

Almost surely, 2^1442446981 is an apocalyptic number.

It is an amenable number.

1442446981 is a deficient number, since it is larger than the sum of its proper divisors (1).

1442446981 is an equidigital number, since it uses as much as digits as its factorization.

1442446981 is an evil number, because the sum of its binary digits is even.

The product of its digits is 221184, while the sum is 43.

The square root of 1442446981 is about 37979.5600422122. The cubic root of 1442446981 is about 1129.8825108223.

The spelling of 1442446981 in words is "one billion, four hundred forty-two million, four hundred forty-six thousand, nine hundred eighty-one".