1241533021 has 4 divisors (see below), whose sum is σ = 1249149952. Its totient is φ = 1233916092.

The previous prime is 1241533019. The next prime is 1241533049. The reversal of 1241533021 is 1203351421.

It is a happy number.

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: 1203351421 = 23 ⋅52319627.

It is a cyclic number.

It is not a de Polignac number, because 1241533021 - 2¹ = 1241533019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1241532983 and 1241533001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1241533121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3808221 + ... + 3808546.

It is an arithmetic number, because the mean of its divisors is an integer number (312287488).

Almost surely, 2^1241533021 is an apocalyptic number.

It is an amenable number.

1241533021 is a deficient number, since it is larger than the sum of its proper divisors (7616931).

1241533021 is an equidigital number, since it uses as much as digits as its factorization.

1241533021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7616930.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1241533021 is about 35235.3944351415. The cubic root of 1241533021 is about 1074.7796255674.

Adding to 1241533021 its reverse (1203351421), we get a palindrome (2444884442).

The spelling of 1241533021 in words is "one billion, two hundred forty-one million, five hundred thirty-three thousand, twenty-one".