1341242021 has 4 divisors (see below), whose sum is σ = 1532848032. Its totient is φ = 1149636012.

The previous prime is 1341242011. The next prime is 1341242027. The reversal of 1341242021 is 1202421431.

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: 1202421431 = 233 ⋅5160607.

It is not a de Polignac number, because 1341242021 - 2¹⁰ = 1341240997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1341241984 and 1341242002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1341242027) 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, 95802995 + ... + 95803008.

It is an arithmetic number, because the mean of its divisors is an integer number (383212008).

Almost surely, 2^1341242021 is an apocalyptic number.

It is an amenable number.

1341242021 is a deficient number, since it is larger than the sum of its proper divisors (191606011).

1341242021 is an equidigital number, since it uses as much as digits as its factorization.

1341242021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 191606010.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 1341242021 is about 36622.9712202601. The cubic root of 1341242021 is about 1102.8142870556.

Adding to 1341242021 its reverse (1202421431), we get a palindrome (2543663452).

The spelling of 1341242021 in words is "one billion, three hundred forty-one million, two hundred forty-two thousand, twenty-one".