3962421 has 6 divisors (see below), whose sum is σ = 5723510. Its totient is φ = 2641608.

The previous prime is 3962359. The next prime is 3962437. The reversal of 3962421 is 1242693.

3962421 is a `hidden beast` number, since 39 + 624 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3944196 + 18225 = 1986^2 + 135^2 .

It is not a de Polignac number, because 3962421 - 2¹¹ = 3960373 is a prime.

It is a super-3 number, since 3×3962421³ (a number of 21 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3962461) 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 5 ways as a sum of consecutive naturals, for example, 220126 + ... + 220143.

Almost surely, 2^3962421 is an apocalyptic number.

It is an amenable number.

3962421 is a deficient number, since it is larger than the sum of its proper divisors (1761089).

3962421 is a wasteful number, since it uses less digits than its factorization.

3962421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440275 (or 440272 counting only the distinct ones).

The product of its digits is 2592, while the sum is 27.

The square root of 3962421 is about 1990.5830804063. The cubic root of 3962421 is about 158.2414324180.

The spelling of 3962421 in words is "three million, nine hundred sixty-two thousand, four hundred twenty-one".