1021434445 has 4 divisors (see below), whose sum is σ = 1225721340. Its totient is φ = 817147552.

The previous prime is 1021434431. The next prime is 1021434481. The reversal of 1021434445 is 5444341201.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 765850276 + 255584169 = 27674^2 + 15987^2 .

It is a cyclic number.

It is not a de Polignac number, because 1021434445 - 2¹³ = 1021426253 is a prime.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 102143440 + ... + 102143449.

It is an arithmetic number, because the mean of its divisors is an integer number (306430335).

Almost surely, 2^1021434445 is an apocalyptic number.

It is an amenable number.

1021434445 is a deficient number, since it is larger than the sum of its proper divisors (204286895).

1021434445 is an equidigital number, since it uses as much as digits as its factorization.

1021434445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 204286894.

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 1021434445 is about 31959.8880630080. Note that the first 3 decimals coincide. The cubic root of 1021434445 is about 1007.0943659519.

Adding to 1021434445 its reverse (5444341201), we get a palindrome (6465775646).

The spelling of 1021434445 in words is "one billion, twenty-one million, four hundred thirty-four thousand, four hundred forty-five".