3934921 has 4 divisors (see below), whose sum is σ = 3947652. Its totient is φ = 3922192.

The previous prime is 3934901. The next prime is 3934943. The reversal of 3934921 is 1294393.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 622521 + 3312400 = 789^2 + 1820^2 .

It is a cyclic number.

It is not a de Polignac number, because 3934921 - 2¹³ = 3926729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3934901) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5890 + ... + 6523.

It is an arithmetic number, because the mean of its divisors is an integer number (986913).

Almost surely, 2^3934921 is an apocalyptic number.

It is an amenable number.

3934921 is a deficient number, since it is larger than the sum of its proper divisors (12731).

3934921 is a wasteful number, since it uses less digits than its factorization.

3934921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12730.

The product of its digits is 5832, while the sum is 31.

The square root of 3934921 is about 1983.6635299365. The cubic root of 3934921 is about 157.8745064510.

The spelling of 3934921 in words is "three million, nine hundred thirty-four thousand, nine hundred twenty-one".