3445004021 has 4 divisors (see below), whose sum is σ = 3450280332. Its totient is φ = 3439727712.

The previous prime is 3445004011. The next prime is 3445004033. The reversal of 3445004021 is 1204005443.

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 2121063025 + 1323940996 = 46055^2 + 36386^2 .

It is a cyclic number.

It is not a de Polignac number, because 3445004021 - 2⁶ = 3445003957 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 (3445004011) 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 3 ways as a sum of consecutive naturals, for example, 2637176 + ... + 2638481.

It is an arithmetic number, because the mean of its divisors is an integer number (862570083).

Almost surely, 2^3445004021 is an apocalyptic number.

It is an amenable number.

3445004021 is a deficient number, since it is larger than the sum of its proper divisors (5276311).

3445004021 is an equidigital number, since it uses as much as digits as its factorization.

3445004021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5276310.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 3445004021 is about 58694.1566171625. The cubic root of 3445004021 is about 1510.3000764682.

Adding to 3445004021 its reverse (1204005443), we get a palindrome (4649009464).

The spelling of 3445004021 in words is "three billion, four hundred forty-five million, four thousand, twenty-one".