1241234521 has 2 divisors, whose sum is σ = 1241234522. Its totient is φ = 1241234520.

The previous prime is 1241234503. The next prime is 1241234569. The reversal of 1241234521 is 1254321421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 773118025 + 468116496 = 27805^2 + 21636^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1241234521 is a prime.

It is a super-2 number, since 2×1241234521² = 3081326272244198882, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1241232521) 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 as a sum of consecutive naturals, namely, 620617260 + 620617261.

It is an arithmetic number, because the mean of its divisors is an integer number (620617261).

Almost surely, 2^1241234521 is an apocalyptic number.

It is an amenable number.

1241234521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1241234521 is an equidigital number, since it uses as much as digits as its factorization.

1241234521 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1920, while the sum is 25.

The square root of 1241234521 is about 35231.1583828860. The cubic root of 1241234521 is about 1074.6934827564.

Adding to 1241234521 its reverse (1254321421), we get a palindrome (2495555942).

The spelling of 1241234521 in words is "one billion, two hundred forty-one million, two hundred thirty-four thousand, five hundred twenty-one".