1042136521 has 2 divisors, whose sum is σ = 1042136522. Its totient is φ = 1042136520.

The previous prime is 1042136507. The next prime is 1042136527. The reversal of 1042136521 is 1256312401.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 583705600 + 458430921 = 24160^2 + 21411^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042136521 - 2⁹ = 1042136009 is a prime.

It is not a weakly prime, because it can be changed into another prime (1042136527) 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 as a sum of consecutive naturals, namely, 521068260 + 521068261.

It is an arithmetic number, because the mean of its divisors is an integer number (521068261).

Almost surely, 2^1042136521 is an apocalyptic number.

It is an amenable number.

1042136521 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042136521 is an equidigital number, since it uses as much as digits as its factorization.

1042136521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 1042136521 is about 32282.1393498015. The cubic root of 1042136521 is about 1013.8527229635.

Adding to 1042136521 its reverse (1256312401), we get a palindrome (2298448922).

The spelling of 1042136521 in words is "one billion, forty-two million, one hundred thirty-six thousand, five hundred twenty-one".