1442217761 has 4 divisors (see below), whose sum is σ = 1451769024. Its totient is φ = 1432666500.

The previous prime is 1442217731. The next prime is 1442217767. The reversal of 1442217761 is 1677122441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1677122441 = 23 ⋅72918367.

It is a cyclic number.

It is not a de Polignac number, because 1442217761 - 2⁶ = 1442217697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1442217767) 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 3 ways as a sum of consecutive naturals, for example, 4775405 + ... + 4775706.

It is an arithmetic number, because the mean of its divisors is an integer number (362942256).

Almost surely, 2^1442217761 is an apocalyptic number.

It is an amenable number.

1442217761 is a deficient number, since it is larger than the sum of its proper divisors (9551263).

1442217761 is an equidigital number, since it uses as much as digits as its factorization.

1442217761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9551262.

The product of its digits is 18816, while the sum is 35.

The square root of 1442217761 is about 37976.5422464974. The cubic root of 1442217761 is about 1129.8226575793.

The spelling of 1442217761 in words is "one billion, four hundred forty-two million, two hundred seventeen thousand, seven hundred sixty-one".