1442051521 has 4 divisors (see below), whose sum is σ = 1488569344. Its totient is φ = 1395533700.

The previous prime is 1442051489. The next prime is 1442051551. The reversal of 1442051521 is 1251502441.

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: 1251502441 = 7 ⋅178786063.

It is a cyclic number.

It is not a de Polignac number, because 1442051521 - 2⁵ = 1442051489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1442051551) 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, 23258865 + ... + 23258926.

It is an arithmetic number, because the mean of its divisors is an integer number (372142336).

Almost surely, 2^1442051521 is an apocalyptic number.

It is an amenable number.

1442051521 is a deficient number, since it is larger than the sum of its proper divisors (46517823).

1442051521 is an equidigital number, since it uses as much as digits as its factorization.

1442051521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46517822.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1442051521 is about 37974.3534638840. The cubic root of 1442051521 is about 1129.7792455184.

Adding to 1442051521 its reverse (1251502441), we get a palindrome (2693553962).

The spelling of 1442051521 in words is "one billion, four hundred forty-two million, fifty-one thousand, five hundred twenty-one".