4927921 has 2 divisors, whose sum is σ = 4927922. Its totient is φ = 4927920.

The previous prime is 4927873. The next prime is 4927927. The reversal of 4927921 is 1297294.

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., 4682896 + 245025 = 2164^2 + 495^2 .

It is a cyclic number.

It is not a de Polignac number, because 4927921 - 2⁹ = 4927409 is a prime.

It is not a weakly prime, because it can be changed into another prime (4927927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2463960 + 2463961.

It is an arithmetic number, because the mean of its divisors is an integer number (2463961).

Almost surely, 2^4927921 is an apocalyptic number.

It is an amenable number.

4927921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4927921 is an equidigital number, since it uses as much as digits as its factorization.

4927921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9072, while the sum is 34.

The square root of 4927921 is about 2219.8921144957. The cubic root of 4927921 is about 170.1719252617.

The spelling of 4927921 in words is "four million, nine hundred twenty-seven thousand, nine hundred twenty-one".