1021604029 has 2 divisors, whose sum is σ = 1021604030. Its totient is φ = 1021604028.

The previous prime is 1021604021. The next prime is 1021604053. The reversal of 1021604029 is 9204061201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 990801529 + 30802500 = 31477^2 + 5550^2 .

It is an emirp because it is prime and its reverse (9204061201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1021604029 - 2³ = 1021604021 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1021603994 and 1021604012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021604021) 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, 510802014 + 510802015.

It is an arithmetic number, because the mean of its divisors is an integer number (510802015).

Almost surely, 2^1021604029 is an apocalyptic number.

It is an amenable number.

1021604029 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021604029 is an equidigital number, since it uses as much as digits as its factorization.

1021604029 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 1021604029 is about 31962.5410285227. The cubic root of 1021604029 is about 1007.1500972622.

The spelling of 1021604029 in words is "one billion, twenty-one million, six hundred four thousand, twenty-nine".