4021255525 has 12 divisors (see below), whose sum is σ = 5698693792. Its totient is φ = 2757432240.

The previous prime is 4021255501. The next prime is 4021255529. The reversal of 4021255525 is 5255521204.

It is a happy number.

It is not a de Polignac number, because 4021255525 - 2⁵ = 4021255493 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 (4021255529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11489127 + ... + 11489476.

Almost surely, 2^4021255525 is an apocalyptic number.

It is an amenable number.

4021255525 is a deficient number, since it is larger than the sum of its proper divisors (1677438267).

4021255525 is a wasteful number, since it uses less digits than its factorization.

4021255525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22978620 (or 22978615 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 31.

The square root of 4021255525 is about 63413.3702384600. The cubic root of 4021255525 is about 1590.2078397399.

Adding to 4021255525 its reverse (5255521204), we get a palindrome (9276776729).

The spelling of 4021255525 in words is "four billion, twenty-one million, two hundred fifty-five thousand, five hundred twenty-five".