3620421 has 12 divisors (see below), whose sum is σ = 5976672. Its totient is φ = 2068776.

The previous prime is 3620401. The next prime is 3620437. The reversal of 3620421 is 1240263.

It is a happy number.

3620421 is a `hidden beast` number, since 3 + 620 + 42 + 1 = 666.

It is not a de Polignac number, because 3620421 - 2⁷ = 3620293 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 3620394 and 3620403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3620401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 28671 + ... + 28796.

It is an arithmetic number, because the mean of its divisors is an integer number (498056).

Almost surely, 2^3620421 is an apocalyptic number.

It is an amenable number.

3620421 is a deficient number, since it is larger than the sum of its proper divisors (2356251).

3620421 is a wasteful number, since it uses less digits than its factorization.

3620421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57480 (or 57477 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 3620421 is about 1902.7403921712. The cubic root of 3620421 is about 153.5511329330.

Adding to 3620421 its reverse (1240263), we get a palindrome (4860684).

The spelling of 3620421 in words is "three million, six hundred twenty thousand, four hundred twenty-one".