1442243261 has 8 divisors (see below), whose sum is σ = 1489588920. Its totient is φ = 1395643392.

The previous prime is 1442243249. The next prime is 1442243329. The reversal of 1442243261 is 1623422441.

It can be written as a sum of positive squares in 4 ways, for example, as 666620761 + 775622500 = 25819^2 + 27850^2 .

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 1442243261 - 2¹⁰ = 1442242237 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1442249261) 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, 182516 + ... + 190253.

It is an arithmetic number, because the mean of its divisors is an integer number (186198615).

Almost surely, 2^1442243261 is an apocalyptic number.

It is an amenable number.

1442243261 is a deficient number, since it is larger than the sum of its proper divisors (47345659).

1442243261 is an equidigital number, since it uses as much as digits as its factorization.

1442243261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372895.

The product of its digits is 9216, while the sum is 29.

The square root of 1442243261 is about 37976.8779785806. The cubic root of 1442243261 is about 1129.8293163768.

The spelling of 1442243261 in words is "one billion, four hundred forty-two million, two hundred forty-three thousand, two hundred sixty-one".