1241230521 has 4 divisors (see below), whose sum is σ = 1654974032. Its totient is φ = 827487012.

The previous prime is 1241230517. The next prime is 1241230547. The reversal of 1241230521 is 1250321421.

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.

It is not a de Polignac number, because 1241230521 - 2² = 1241230517 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1241230321) 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, 206871751 + ... + 206871756.

It is an arithmetic number, because the mean of its divisors is an integer number (413743508).

Almost surely, 2^1241230521 is an apocalyptic number.

It is an amenable number.

1241230521 is a deficient number, since it is larger than the sum of its proper divisors (413743511).

1241230521 is an equidigital number, since it uses as much as digits as its factorization.

1241230521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 413743510.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1241230521 is about 35231.1016149084. The cubic root of 1241230521 is about 1074.6923283201.

Adding to 1241230521 its reverse (1250321421), we get a palindrome (2491551942).

The spelling of 1241230521 in words is "one billion, two hundred forty-one million, two hundred thirty thousand, five hundred twenty-one".