4025054021 has 2 divisors, whose sum is σ = 4025054022. Its totient is φ = 4025054020.

The previous prime is 4025054003. The next prime is 4025054063. The reversal of 4025054021 is 1204505204.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4005117796 + 19936225 = 63286^2 + 4465^2 .

It is a cyclic number.

It is not a de Polignac number, because 4025054021 - 2⁶ = 4025053957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4025054081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2012527010 + 2012527011.

It is an arithmetic number, because the mean of its divisors is an integer number (2012527011).

Almost surely, 2^4025054021 is an apocalyptic number.

It is an amenable number.

4025054021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4025054021 is an equidigital number, since it uses as much as digits as its factorization.

4025054021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1600, while the sum is 23.

The square root of 4025054021 is about 63443.3134459416. The cubic root of 4025054021 is about 1590.7083879849.

Adding to 4025054021 its reverse (1204505204), we get a palindrome (5229559225).

The spelling of 4025054021 in words is "four billion, twenty-five million, fifty-four thousand, twenty-one".