3855003421 has 2 divisors, whose sum is σ = 3855003422. Its totient is φ = 3855003420.

The previous prime is 3855003401. The next prime is 3855003443. The reversal of 3855003421 is 1243005583.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3034467396 + 820536025 = 55086^2 + 28645^2 .

It is a cyclic number.

It is not a de Polignac number, because 3855003421 - 2²³ = 3846614813 is a prime.

It is a super-2 number, since 2×3855003421² = 29722102751843406482, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3855003401) 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, 1927501710 + 1927501711.

It is an arithmetic number, because the mean of its divisors is an integer number (1927501711).

Almost surely, 2^3855003421 is an apocalyptic number.

It is an amenable number.

3855003421 is a deficient number, since it is larger than the sum of its proper divisors (1).

3855003421 is an equidigital number, since it uses as much as digits as its factorization.

3855003421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 31.

The square root of 3855003421 is about 62088.6738544157. The cubic root of 3855003421 is about 1567.9838646570.

The spelling of 3855003421 in words is "three billion, eight hundred fifty-five million, three thousand, four hundred twenty-one".