1042120445 has 4 divisors (see below), whose sum is σ = 1250544540. Its totient is φ = 833696352.

The previous prime is 1042120441. The next prime is 1042120447. The reversal of 1042120445 is 5440212401.

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 116683204 + 925437241 = 10802^2 + 30421^2 .

It is a cyclic number.

It is not a de Polignac number, because 1042120445 - 2² = 1042120441 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1042120445.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1042120441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104212040 + ... + 104212049.

It is an arithmetic number, because the mean of its divisors is an integer number (312636135).

Almost surely, 2^1042120445 is an apocalyptic number.

It is an amenable number.

1042120445 is a deficient number, since it is larger than the sum of its proper divisors (208424095).

1042120445 is an equidigital number, since it uses as much as digits as its factorization.

1042120445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208424094.

The product of its (nonzero) digits is 1280, while the sum is 23.

The square root of 1042120445 is about 32281.8903566690. The cubic root of 1042120445 is about 1013.8475097054.

Adding to 1042120445 its reverse (5440212401), we get a palindrome (6482332846).

The spelling of 1042120445 in words is "one billion, forty-two million, one hundred twenty thousand, four hundred forty-five".