1241353021 has 4 divisors (see below), whose sum is σ = 1241492544. Its totient is φ = 1241213500.

The previous prime is 1241352977. The next prime is 1241353051. The reversal of 1241353021 is 1203531421.

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: 1203531421 = 19 ⋅63343759.

It is a cyclic number.

It is not a de Polignac number, because 1241353021 - 2¹³ = 1241344829 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1241352983 and 1241353001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1241353051) 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, 55435 + ... + 74536.

It is an arithmetic number, because the mean of its divisors is an integer number (310373136).

Almost surely, 2^1241353021 is an apocalyptic number.

It is an amenable number.

1241353021 is a deficient number, since it is larger than the sum of its proper divisors (139523).

1241353021 is an equidigital number, since it uses as much as digits as its factorization.

1241353021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139522.

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

The square root of 1241353021 is about 35232.8400927317. The cubic root of 1241353021 is about 1074.7276818066.

Adding to 1241353021 its reverse (1203531421), we get a palindrome (2444884442).

The spelling of 1241353021 in words is "one billion, two hundred forty-one million, three hundred fifty-three thousand, twenty-one".