3827421 has 12 divisors (see below), whose sum is σ = 5953948. Its totient is φ = 2355264.

The previous prime is 3827419. The next prime is 3827429. The reversal of 3827421 is 1247283.

It can be written as a sum of positive squares in 2 ways, for example, as 1232100 + 2595321 = 1110^2 + 1611^2 .

It is not a de Polignac number, because 3827421 - 2¹ = 3827419 is a prime.

It is a super-2 number, since 2×3827421² = 29298303022482, which contains 22 as substring.

3827421 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3827429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16240 + ... + 16473.

Almost surely, 2^3827421 is an apocalyptic number.

It is an amenable number.

3827421 is a deficient number, since it is larger than the sum of its proper divisors (2126527).

3827421 is a wasteful number, since it uses less digits than its factorization.

3827421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32732 (or 32729 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 3827421 is about 1956.3795643995. The cubic root of 3827421 is about 156.4235285974.

The spelling of 3827421 in words is "three million, eight hundred twenty-seven thousand, four hundred twenty-one".