3914921 has 2 divisors, whose sum is σ = 3914922. Its totient is φ = 3914920.

The previous prime is 3914903. The next prime is 3914923. The reversal of 3914921 is 1294193.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3763600 + 151321 = 1940^2 + 389^2 .

It is a cyclic number.

It is not a de Polignac number, because 3914921 - 2⁶ = 3914857 is a prime.

Together with 3914923, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (3914923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1957460 + 1957461.

It is an arithmetic number, because the mean of its divisors is an integer number (1957461).

Almost surely, 2^3914921 is an apocalyptic number.

It is an amenable number.

3914921 is a deficient number, since it is larger than the sum of its proper divisors (1).

3914921 is an equidigital number, since it uses as much as digits as its factorization.

3914921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1944, while the sum is 29.

The square root of 3914921 is about 1978.6159303917. The cubic root of 3914921 is about 157.6065760567.

The spelling of 3914921 in words is "three million, nine hundred fourteen thousand, nine hundred twenty-one".