1241202421 has 4 divisors (see below), whose sum is σ = 1241275500. Its totient is φ = 1241129344.

The previous prime is 1241202409. The next prime is 1241202437. The reversal of 1241202421 is 1242021421.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 935442225 + 305760196 = 30585^2 + 17486^2 .

It is a cyclic number.

It is not a de Polignac number, because 1241202421 - 2¹⁹ = 1240678133 is a prime.

It is a super-2 number, since 2×1241202421² = 3081166899792522482, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1241202401) 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, 3735 + ... + 49963.

It is an arithmetic number, because the mean of its divisors is an integer number (310318875).

Almost surely, 2^1241202421 is an apocalyptic number.

It is an amenable number.

1241202421 is a deficient number, since it is larger than the sum of its proper divisors (73079).

1241202421 is an equidigital number, since it uses as much as digits as its factorization.

1241202421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73078.

The product of its (nonzero) digits is 256, while the sum is 19.

The square root of 1241202421 is about 35230.7028172871. The cubic root of 1241202421 is about 1074.6842183352.

Adding to 1241202421 its reverse (1242021421), we get a palindrome (2483223842).

The spelling of 1241202421 in words is "one billion, two hundred forty-one million, two hundred two thousand, four hundred twenty-one".