4251034421 has 2 divisors, whose sum is σ = 4251034422. Its totient is φ = 4251034420.

The previous prime is 4251034391. The next prime is 4251034457. The reversal of 4251034421 is 1244301524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4187513521 + 63520900 = 64711^2 + 7970^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4251034421 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4251034471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2125517210 + 2125517211.

It is an arithmetic number, because the mean of its divisors is an integer number (2125517211).

Almost surely, 2^4251034421 is an apocalyptic number.

It is an amenable number.

4251034421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4251034421 is an equidigital number, since it uses as much as digits as its factorization.

4251034421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3840, while the sum is 26.

The square root of 4251034421 is about 65199.9572162436. The cubic root of 4251034421 is about 1619.9373065460.

Adding to 4251034421 its reverse (1244301524), we get a palindrome (5495335945).

The spelling of 4251034421 in words is "four billion, two hundred fifty-one million, thirty-four thousand, four hundred twenty-one".