1051342421 has 2 divisors, whose sum is σ = 1051342422. Its totient is φ = 1051342420.

The previous prime is 1051342393. The next prime is 1051342469. The reversal of 1051342421 is 1242431501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 624300196 + 427042225 = 24986^2 + 20665^2 .

It is an emirp because it is prime and its reverse (1242431501) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1051342421 - 2¹⁰ = 1051341397 is a prime.

It is a super-2 number, since 2×1051342421² = 2210641772388282482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1051342471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 525671210 + 525671211.

It is an arithmetic number, because the mean of its divisors is an integer number (525671211).

Almost surely, 2^1051342421 is an apocalyptic number.

It is an amenable number.

1051342421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1051342421 is an equidigital number, since it uses as much as digits as its factorization.

1051342421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 1051342421 is about 32424.4108813098. The cubic root of 1051342421 is about 1016.8293253078.

Adding to 1051342421 its reverse (1242431501), we get a palindrome (2293773922).

The spelling of 1051342421 in words is "one billion, fifty-one million, three hundred forty-two thousand, four hundred twenty-one".