1042515421 has 2 divisors, whose sum is σ = 1042515422. Its totient is φ = 1042515420.

The previous prime is 1042515347. The next prime is 1042515469. The reversal of 1042515421 is 1245152401.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 729756196 + 312759225 = 27014^2 + 17685^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042515421 - 2¹³ = 1042507229 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1042545421) 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, 521257710 + 521257711.

It is an arithmetic number, because the mean of its divisors is an integer number (521257711).

Almost surely, 2^1042515421 is an apocalyptic number.

It is an amenable number.

1042515421 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042515421 is an equidigital number, since it uses as much as digits as its factorization.

1042515421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1600, while the sum is 25.

The square root of 1042515421 is about 32288.0073866443. The cubic root of 1042515421 is about 1013.9755802674.

Adding to 1042515421 its reverse (1245152401), we get a palindrome (2287667822).

The spelling of 1042515421 in words is "one billion, forty-two million, five hundred fifteen thousand, four hundred twenty-one".