4294921 has 2 divisors, whose sum is σ = 4294922. Its totient is φ = 4294920.

The previous prime is 4294919. The next prime is 4294933. The reversal of 4294921 is 1294924.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4182025 + 112896 = 2045^2 + 336^2 .

It is a cyclic number.

It is not a de Polignac number, because 4294921 - 2¹ = 4294919 is a prime.

Together with 4294919, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4294991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2147460 + 2147461.

It is an arithmetic number, because the mean of its divisors is an integer number (2147461).

Almost surely, 2^4294921 is an apocalyptic number.

It is an amenable number.

4294921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4294921 is an equidigital number, since it uses as much as digits as its factorization.

4294921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 31.

The square root of 4294921 is about 2072.4191178427. The cubic root of 4294921 is about 162.5492836709.

The spelling of 4294921 in words is "four million, two hundred ninety-four thousand, nine hundred twenty-one".