4025502421 has 2 divisors, whose sum is σ = 4025502422. Its totient is φ = 4025502420.

The previous prime is 4025502401. The next prime is 4025502449. The reversal of 4025502421 is 1242055204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2571605521 + 1453896900 = 50711^2 + 38130^2 .

It is a cyclic number.

It is not a de Polignac number, because 4025502421 - 2⁷ = 4025502293 is a prime.

It is a super-2 number, since 2×4025502421² = 32409339482953722482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4025502401) 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 as a sum of consecutive naturals, namely, 2012751210 + 2012751211.

It is an arithmetic number, because the mean of its divisors is an integer number (2012751211).

Almost surely, 2^4025502421 is an apocalyptic number.

It is an amenable number.

4025502421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4025502421 is an equidigital number, since it uses as much as digits as its factorization.

4025502421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3200, while the sum is 25.

The square root of 4025502421 is about 63446.8472108741. The cubic root of 4025502421 is about 1590.7674552796.

Adding to 4025502421 its reverse (1242055204), we get a palindrome (5267557625).

The spelling of 4025502421 in words is "four billion, twenty-five million, five hundred two thousand, four hundred twenty-one".