4021525073 has 4 divisors (see below), whose sum is σ = 4023219300. Its totient is φ = 4019830848.

The previous prime is 4021525063. The next prime is 4021525087. The reversal of 4021525073 is 3705251204.

It is a happy number.

4021525073 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 3169352209 + 852172864 = 56297^2 + 29192^2 .

It is a cyclic number.

It is not a de Polignac number, because 4021525073 - 2²⁰ = 4020476497 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4021525063) 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, 843548 + ... + 848301.

It is an arithmetic number, because the mean of its divisors is an integer number (1005804825).

Almost surely, 2^4021525073 is an apocalyptic number.

It is an amenable number.

4021525073 is a deficient number, since it is larger than the sum of its proper divisors (1694227).

4021525073 is a wasteful number, since it uses less digits than its factorization.

4021525073 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694226.

The product of its (nonzero) digits is 8400, while the sum is 29.

The square root of 4021525073 is about 63415.4955275128. The cubic root of 4021525073 is about 1590.2433699173.

Adding to 4021525073 its reverse (3705251204), we get a palindrome (7726776277).

The spelling of 4021525073 in words is "four billion, twenty-one million, five hundred twenty-five thousand, seventy-three".