1442267021 has 4 divisors (see below), whose sum is σ = 1553210652. Its totient is φ = 1331323392.

The previous prime is 1442267011. The next prime is 1442267023. The reversal of 1442267021 is 1207622441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1207622441 = 4273 ⋅282617.

It can be written as a sum of positive squares in 2 ways, for example, as 233661796 + 1208605225 = 15286^2 + 34765^2 .

It is a cyclic number.

It is not a de Polignac number, because 1442267021 - 2¹⁸ = 1442004877 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1442267023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 55471796 + ... + 55471821.

It is an arithmetic number, because the mean of its divisors is an integer number (388302663).

Almost surely, 2^1442267021 is an apocalyptic number.

It is an amenable number.

1442267021 is a deficient number, since it is larger than the sum of its proper divisors (110943631).

1442267021 is a wasteful number, since it uses less digits than its factorization.

1442267021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110943630.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 1442267021 is about 37977.1907992153. The cubic root of 1442267021 is about 1129.8355207386.

Adding to 1442267021 its reverse (1207622441), we get a palindrome (2649889462).

The spelling of 1442267021 in words is "one billion, four hundred forty-two million, two hundred sixty-seven thousand, twenty-one".