1442241809 has 2 divisors, whose sum is σ = 1442241810. Its totient is φ = 1442241808.

The previous prime is 1442241769. The next prime is 1442241817. The reversal of 1442241809 is 9081422441.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1416769600 + 25472209 = 37640^2 + 5047^2 .

It is a cyclic number.

It is not a de Polignac number, because 1442241809 - 2⁸ = 1442241553 is a prime.

It is a super-2 number, since 2×1442241809² = 4160122871255184962, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1442241209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 721120904 + 721120905.

It is an arithmetic number, because the mean of its divisors is an integer number (721120905).

Almost surely, 2^1442241809 is an apocalyptic number.

It is an amenable number.

1442241809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1442241809 is an equidigital number, since it uses as much as digits as its factorization.

1442241809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18432, while the sum is 35.

The square root of 1442241809 is about 37976.8588616805. The cubic root of 1442241809 is about 1129.8289372191.

The spelling of 1442241809 in words is "one billion, four hundred forty-two million, two hundred forty-one thousand, eight hundred nine".