1241521013 has 4 divisors (see below), whose sum is σ = 1243030368. Its totient is φ = 1240011660.

The previous prime is 1241520961. The next prime is 1241521031. The reversal of 1241521013 is 3101251421.

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 a cyclic number.

It is not a de Polignac number, because 1241521013 - 2⁸ = 1241520757 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1241521063) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 753443 + ... + 755088.

It is an arithmetic number, because the mean of its divisors is an integer number (310757592).

Almost surely, 2^1241521013 is an apocalyptic number.

It is an amenable number.

1241521013 is a deficient number, since it is larger than the sum of its proper divisors (1509355).

1241521013 is an equidigital number, since it uses as much as digits as its factorization.

1241521013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1509354.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1241521013 is about 35235.2240378857. The cubic root of 1241521013 is about 1074.7761604977.

Adding to 1241521013 its reverse (3101251421), we get a palindrome (4342772434).

The spelling of 1241521013 in words is "one billion, two hundred forty-one million, five hundred twenty-one thousand, thirteen".