4251260421 has 6 divisors (see below), whose sum is σ = 6140709510. Its totient is φ = 2834173608.

The previous prime is 4251260389. The next prime is 4251260441. The reversal of 4251260421 is 1240621524.

4251260421 is a `hidden beast` number, since 4 + 2 + 51 + 2 + 604 + 2 + 1 = 666.

4251260421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 4213437921 + 37822500 = 64911^2 + 6150^2 .

It is not a de Polignac number, because 4251260421 - 2⁵ = 4251260389 is a prime.

It is a super-2 number, since 2×4251260421² = 36146430334322194482, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4251260441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 236181126 + ... + 236181143.

It is an arithmetic number, because the mean of its divisors is an integer number (1023451585).

Almost surely, 2^4251260421 is an apocalyptic number.

It is an amenable number.

4251260421 is a deficient number, since it is larger than the sum of its proper divisors (1889449089).

4251260421 is a wasteful number, since it uses less digits than its factorization.

4251260421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472362275 (or 472362272 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

The square root of 4251260421 is about 65201.6903231810. The cubic root of 4251260421 is about 1619.9660132330.

Adding to 4251260421 its reverse (1240621524), we get a palindrome (5491881945).

The spelling of 4251260421 in words is "four billion, two hundred fifty-one million, two hundred sixty thousand, four hundred twenty-one".