3851421 has 16 divisors (see below), whose sum is σ = 5900928. Its totient is φ = 2188800.

The previous prime is 3851413. The next prime is 3851423. The reversal of 3851421 is 1241583.

It is not a de Polignac number, because 3851421 - 2³ = 3851413 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3851391 and 3851400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3851423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4681 + ... + 5441.

It is an arithmetic number, because the mean of its divisors is an integer number (368808).

Almost surely, 2^3851421 is an apocalyptic number.

It is an amenable number.

3851421 is a deficient number, since it is larger than the sum of its proper divisors (2049507).

3851421 is a wasteful number, since it uses less digits than its factorization.

3851421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012.

The product of its digits is 960, while the sum is 24.

The square root of 3851421 is about 1962.5037579582. The cubic root of 3851421 is about 156.7498009557.

The spelling of 3851421 in words is "three million, eight hundred fifty-one thousand, four hundred twenty-one".