1042526021 has 2 divisors, whose sum is σ = 1042526022. Its totient is φ = 1042526020.

The previous prime is 1042525999. The next prime is 1042526033. The reversal of 1042526021 is 1206252401.

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., 904204900 + 138321121 = 30070^2 + 11761^2 .

It is an emirp because it is prime and its reverse (1206252401) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1042526021 - 2¹⁰ = 1042524997 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1042526041) 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, 521263010 + 521263011.

It is an arithmetic number, because the mean of its divisors is an integer number (521263011).

Almost surely, 2^1042526021 is an apocalyptic number.

It is an amenable number.

1042526021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1042526021 is an equidigital number, since it uses as much as digits as its factorization.

1042526021 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 1042526021 is about 32288.1715338605. The cubic root of 1042526021 is about 1013.9790168608.

Adding to 1042526021 its reverse (1206252401), we get a palindrome (2248778422).

The spelling of 1042526021 in words is "one billion, forty-two million, five hundred twenty-six thousand, twenty-one".