4381258421 has 2 divisors, whose sum is σ = 4381258422. Its totient is φ = 4381258420.

The previous prime is 4381258397. The next prime is 4381258459. The reversal of 4381258421 is 1248521834.

It is an a-pointer prime, because the next prime (4381258459) can be obtained adding 4381258421 to its sum of digits (38).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2939157796 + 1442100625 = 54214^2 + 37975^2 .

It is a cyclic number.

It is not a de Polignac number, because 4381258421 - 2²² = 4377064117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4381258471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2190629210 + 2190629211.

It is an arithmetic number, because the mean of its divisors is an integer number (2190629211).

Almost surely, 2^4381258421 is an apocalyptic number.

It is an amenable number.

4381258421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4381258421 is an equidigital number, since it uses as much as digits as its factorization.

4381258421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 61440, while the sum is 38.

The square root of 4381258421 is about 66191.0750856941. The cubic root of 4381258421 is about 1636.3126581903.

The spelling of 4381258421 in words is "four billion, three hundred eighty-one million, two hundred fifty-eight thousand, four hundred twenty-one".