1242230521 has 8 divisors (see below), whose sum is σ = 1419993344. Its totient is φ = 1064543040.

The previous prime is 1242230513. The next prime is 1242230531. The reversal of 1242230521 is 1250322421.

It is a happy number.

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 1242230521 - 2³ = 1242230513 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1242230492 and 1242230501.

It is not an unprimeable number, because it can be changed into a prime (1242230531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22576 + ... + 54718.

It is an arithmetic number, because the mean of its divisors is an integer number (177499168).

Almost surely, 2^1242230521 is an apocalyptic number.

It is an amenable number.

1242230521 is a deficient number, since it is larger than the sum of its proper divisors (177762823).

1242230521 is an equidigital number, since it uses as much as digits as its factorization.

1242230521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37671.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 1242230521 is about 35245.2907634481. The cubic root of 1242230521 is about 1074.9808602325.

Adding to 1242230521 its reverse (1250322421), we get a palindrome (2492552942).

The spelling of 1242230521 in words is "one billion, two hundred forty-two million, two hundred thirty thousand, five hundred twenty-one".