1022115445 has 16 divisors (see below), whose sum is σ = 1353107952. Its totient is φ = 736381440.

The previous prime is 1022115421. The next prime is 1022115449. The reversal of 1022115445 is 5445112201.

It can be written as a sum of positive squares in 8 ways, for example, as 311946244 + 710169201 = 17662^2 + 26649^2 .

It is not a de Polignac number, because 1022115445 - 2¹⁹ = 1021591157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1022115449) 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 in 15 ways as a sum of consecutive naturals, for example, 189102 + ... + 194431.

It is an arithmetic number, because the mean of its divisors is an integer number (84569247).

Almost surely, 2^1022115445 is an apocalyptic number.

It is an amenable number.

1022115445 is a deficient number, since it is larger than the sum of its proper divisors (330992507).

1022115445 is a wasteful number, since it uses less digits than its factorization.

1022115445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383592.

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

The square root of 1022115445 is about 31970.5402675651. The cubic root of 1022115445 is about 1007.3181293421.

Adding to 1022115445 its reverse (5445112201), we get a palindrome (6467227646).

The spelling of 1022115445 in words is "one billion, twenty-two million, one hundred fifteen thousand, four hundred forty-five".