3934821 has 8 divisors (see below), whose sum is σ = 5723424. Its totient is φ = 2384720.

The previous prime is 3934813. The next prime is 3934823. The reversal of 3934821 is 1284393.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3934821 - 2³ = 3934813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3934823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 59586 + ... + 59651.

It is an arithmetic number, because the mean of its divisors is an integer number (715428).

Almost surely, 2^3934821 is an apocalyptic number.

It is an amenable number.

3934821 is a deficient number, since it is larger than the sum of its proper divisors (1788603).

3934821 is a wasteful number, since it uses less digits than its factorization.

3934821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119251.

The product of its digits is 5184, while the sum is 30.

The square root of 3934821 is about 1983.6383238887. The cubic root of 3934821 is about 157.8731690599.

The spelling of 3934821 in words is "three million, nine hundred thirty-four thousand, eight hundred twenty-one".